One document matched: draft-moore-auto-email-response-04.ps

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/F0 12/Times-Roman@0 SF 315.708(Internet-Draft K.)72 85 R(Moore)3 E
(Expires: 1 April 2004)72 98 Q(Uni)212.352 E -.18(ve)-.3 G(rsity of T)
.18 E(ennessee)-.84 E 3(1O)429.348 111 S(ctober 2003)-3 E
(Recommendations for Automatic Responses to Electronic Mail)136.014 150
Q(draft-moore-auto-email-response-04)200.694 176 Q/F1 12/Times-Bold@0 SF
(Status of this Memo)72 215 Q F0
(This document is an Internet-Draft and is subject to all pro)72 231.6 Q
(visions of Section 10 of)-.18 E(RFC2026.)72 244.6 Q
(Internet-Drafts are w)72 261.2 Q
(orking documents of the Internet Engineering T)-.12 E(ask F)-.96 E
(orce \(IETF\), its)-.18 E(areas, and its w)72 274.2 Q(orking groups.)
-.12 E(Note that other groups may also distrib)6 E(ute w)-.24 E(orking)
-.12 E(documents as Internet-Drafts.)72 287.2 Q
(Internet-Drafts are draft documents v)72 303.8 Q
(alid for a maximum of six months and may be)-.3 E
(updated, replaced, or obsoleted by other documents at an)72 316.8 Q 3
(yt)-.18 G 3(ime. It)-3 F(is inappropriate to use)3 E
(Internet-Drafts as reference material or to cite them other than as "w)
72 329.8 Q(ork in progress.")-.12 E
(The list of current Internet-Drafts can be accessed at)72 346.4 Q/F2 12
/Courier@0 SF(http://www.ietf.org/1id-abstracts.html)72 359.4 Q F0
(The list of Internet-Draft Shado)72 376 Q 3(wD)-.3 G
(irectories can be accessed at)-3 E F2(http://www.ietf.org/shadow.html)
72 389 Q F0(This document is not currently associated with an)72 405.6 Q
3(yw)-.18 G(orking group.)-3.12 E(Comments on this)6 E
(internet-draft should be sent to the mailing list)72 418.6 Q F2
(<ietf-822@imc.org>)3 E F0 3(,o)C 3(rt)-3 G 3(ot)-3 G(he)-3 E(author)72
431.6 Q 6(.S)-.66 G
(uch comments should cite the Internet-Draft identi\214er)-6 E(draft-mo\
ore-auto-email-response-04 so others can be sure you are commenting on \
the)72 444.6 Q(same v)72 457.6 Q(ersion the)-.18 E 3(yr)-.18 G(ead.)-3 E
F1(Abstract)72 483.6 Q F0(This memo mak)72 500.2 Q
(es recommendations for softw)-.12 E(are that automatically responds to)
-.12 E(incoming electronic mail messages, including "out of the of)72
513.2 Q(\214ce" or "v)-.3 E(acation" response)-.3 E
(generators, mail \214ltering softw)72 526.2 Q
(are, email-based information services, and other automatic)-.12 E 3
(responders. The)72 539.2 R
(purpose of these recommendations is to discourage undesirable beha)3 E
(vior)-.24 E(which is caused or aggra)72 552.2 Q -.3(va)-.24 G
(ted by such softw).3 E(are, to encourage uniform beha)-.12 E
(vior \(where)-.24 E(appropriate\) among automatic mail responders, and\
 to clear up some sources of confusion)72 565.2 Q
(among implementors of automatic email responders.)72 578.2 Q
(Intended status: Once it appears that this document has recei)72 594.8
Q -.18(ve)-.3 G 3(ds).18 G(uf)-3 E(\214cient re)-.3 E(vie)-.3 E -.78(w,)
-.3 G(comment, and community support, the author intends to submitted i\
t as an indi)72 607.8 Q(vidual)-.3 E
(submission for Proposed Standard status.)72 620.8 Q
(Proposed Standard seems more appropriate)6 E(than BCP because this doc\
ument describes protocols more than operational practices.)72 633.8 Q
([[NO)72 646.8 Q(TE T)-.48 E 3(OR)-.216 G(FC EDIT)-3 E
(OR: This paragraph should be remo)-.216 E -.18(ve)-.18 G 3(dp).18 G
(rior to publication as an)-3 E(RFC.]])72 659.8 Q 110.346
(Moore Automatic)72 697 R(E-Mail Responses)3 E([P)105.198 E(age 1])-.18
E EP
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/F0 12/Times-Roman@0 SF 287.712(Internet-Draft 1)72 49 R(October 2003)3
E/F1 12/Times-Bold@0 SF(1. Intr)72 85 Q(oduction)-.216 E F0(Man)72 101.6
Q 3(yp)-.18 G
(rograms which automatically respond to email are currently in use.)-3 E
(Although)6 E(these programs v)72 114.6 Q
(ary widely in their function, se)-.3 E -.18(ve)-.3 G
(ral problems with this class of).18 E(programs ha)72 127.6 Q .36 -.18
(ve b)-.24 H(een observ).18 E
(ed, including: signi\214cant numbers of useless or unw)-.18 E(anted)
-.12 E(response and responses sent to inappropriate addresses, and occa\
sional incidences of mail)72 140.6 Q(loops or "sorcerer')72 153.6 Q 3
(sa)-.66 G(pprentice" mode.)-3 E(This memo recommends beha)6 E
(vior for programs)-.24 E(that automatically respond to electronic mail\
 in order to reduce the number of problems)72 166.6 Q
(caused by such programs.)72 179.6 Q(\(Note: the term "sorcerer')72
196.2 Q 3(sa)-.66 G(pprentice mode" is de\214ned as a b)-3 E
(ug in a protocol where,)-.24 E(under some circumstances, the receipt o\
f a message causes multiple messages to be sent,)72 209.2 Q
(each of which, when recei)72 222.2 Q -.18(ve)-.3 G
(d, triggers the same b).18 E(ug.\) \(From [I1.J)-.24 E(ARGON]\))-.72 E
F1(1.1 T)72 248.2 Q(ypes of automatic r)-.888 E(esponses)-.216 E F0
(There are se)72 264.8 Q -.18(ve)-.3 G(ral dif).18 E
(ferent types of automatic responses.)-.3 E(At least tw)6 E 3(ot)-.12 G
(ypes of automatic)-3 E(responses ha)72 277.8 Q .36 -.18(ve b)-.24 H
(een de\214ned in IETF standards - Deli).18 E -.18(ve)-.3 G
(ry Status Noti\214cations).18 E
([I2.RFC3464] which are intended to report the status of a message deli)
72 290.8 Q -.18(ve)-.3 G(ry by the).18 E(message transport system, and \
Message Disposition Noti\214cations [I3.RFC2298] which)72 303.8 Q(are i\
ntended to report of the disposition of a message after it reaches a re\
cipient')72 316.8 Q(s)-.66 E 3(mailbox. These)72 329.8 R
(responses are de\214ned else)3 E
(where and are generally not within the purvie)-.3 E(w)-.3 E
(of this document, e)72 342.8 Q
(xcept that this document recommends speci\214c cases where the)-.18 E
(y)-.18 E(should or should not be used.)72 355.8 Q
(Other types of automatic response in common use include:)72 372.4 Q/F2
14/Times-Roman@0 SF<83>72 389 Q F0("Out of of)20.1 E(\214ce" or "v)-.3 E
(acation" notices, which are intended to inform the sender of a)-.3 E
(message that the message is unlik)97 402 Q
(ely to be read, or acted on, for some amount of)-.12 E(time,)97 415 Q
F2<83>72 431.6 Q F0("Change of address" notices, intended to inform the\
 sender of a message that the)20.1 E
(recipient address he used is obsolete and that a dif)97 444.6 Q
(ferent address should be used)-.3 E
(instead \(whether or not the subject message w)97 457.6 Q(as forw)-.12
E(arded to the current address\),)-.12 E F2<83>72 474.2 Q F0("Challenge\
s", which require the sender of a message to demonstrate some measure)
20.1 E(of intelligence and/or willingness to agree to some conditions b\
efore the subject)97 487.2 Q(message will be deli)97 500.2 Q -.18(ve)-.3
G(red to the recipient \(often to minimize the ef).18 E
(fect of "spam" or)-.3 E(viruses on the recipient\),)97 513.2 Q F2<83>72
529.8 Q F0(Email-based information services, which accept requests \(pr\
esumably from humans\))20.1 E(via email, pro)97 542.8 Q
(vide some service, and issue responses via email also.)-.18 E
(\(Mailing lists)6 E(which accept subscription requests via email f)97
555.8 Q(all into this cate)-.12 E(gory\),)-.18 E F2<83>72 572.4 Q F0
(Information services similar to those mentioned abo)20.1 E .36 -.18
(ve ex)-.18 H(cept that the).18 E 3(ya)-.18 G(re intended)-3 E
(to accept messages from other programs, and)97 585.4 Q F2<83>72 602 Q
F0 -1.332(Va)20.1 G(rious kinds of mail \214lters \(including "virus sc\
anners"\) which act on behalf of a)1.332 E
(recipient to alter the content of messages before forw)97 615 Q
(arding them to that recipient,)-.12 E(and issue responses in the e)97
628 Q -.18(ve)-.3 G(nt a message is altered.).18 E
(Recognizing the wide v)72 644.6 Q
(ariety of response types in use, these recommendations)-.3 E
(distinguish between se)72 657.6 Q -.18(ve)-.3 G
(ral classes of automatic responders according to the party or).18 E
110.346(Moore Automatic)72 697 R(E-Mail Responses)3 E([P)105.198 E
(age 2])-.18 E EP
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/F0 12/Times-Roman@0 SF 287.712(Internet-Draft 1)72 49 R(October 2003)3
E(service on whose behalf the responder acts:)72 85 Q/F1 14
/Times-Roman@0 SF<83>72 101.6 Q F0("Service Responders" e)20.1 E
(xist to pro)-.18 E(vide access to some service via email requests and)
-.18 E 3(responses. These)97 114.6 R
(are permanently associated with one or more email addresses, and)3 E
(when sending to such an address the sender presumably e)97 127.6 Q
(xpects an automatic)-.18 E 3(response. An)97 140.6 R
(email-based \214le retrie)3 E -.3(va)-.3 G 3(ls).3 G(ervice is an e)-3
E(xample of a Service)-.18 E(Responder)97 153.6 Q 6(.A)-.66 G
(calendar service that allo)-3 E
(wed appointment requests to be made via)-.3 E
(email, and which responded to such requests, w)97 166.6 Q
(ould be another e)-.12 E(xample of a)-.18 E(Service Responder)97 179.6
Q(.)-.66 E F1<83>72 196.2 Q F0("Personal Responders" e)20.1 E
(xist to mak)-.18 E 3(ea)-.12 G
(utomatic responses on behalf of a single)-3 E(recipient address, in ad\
dition to, or in lieu of, that recipient reading the message.)97 209.2 Q
(These responders operate according to criteria speci\214ed on a per)97
222.2 Q(-recipient basis.)-.24 E(The UNIX "v)97 235.2 Q
(acation" program is an e)-.3 E(xample of a Personal Responder)-.18 E 6
(.A)-.66 G(responder)-3 E(that accepts mail sent to a single address, a\
ttempts to analyze and classify the)97 248.2 Q(contents, and then issue\
s a response which is dependent on that classi\214cation, is also)97
261.2 Q 3(aP)97 274.2 S(ersonal Responder)-3 E(.)-.66 E F1<83>72 290.8 Q
F0("Group Responders" e)20.1 E(xist to mak)-.18 E 3(ea)-.12 G
(utomatic responses on behalf of an)-3 E 3(yo)-.18 G 3(fa)-3 G
(signi\214cant set of recipient addresses \(say)97 303.8 Q 3(,e)-.78 G
-.18(ve)-3.3 G(ry recipient in a particular DNS).18 E(domain\), in adv)
97 316.8 Q
(ance of, or in lieu of, a response from the actual recipient.)-.3 E
(Group)6 E(Responders are similar to Personal Responders e)97 329.8 Q
(xcept that in the case of a Group)-.18 E
(Responder the criteria for responding are not set on a per)97 342.8 Q
(-recipient basis.)-.24 E 3(A")6 G(virus)-3 E
(scanner" program that \214ltered all mail sent to an)97 355.8 Q 3(yr)
-.18 G(ecipient on a particular serv)-3 E(er)-.18 E(,)-.48 E
(and sent responses when a message w)97 368.8 Q(as rejected or deli)-.12
E -.18(ve)-.3 G(red in an altered form,).18 E(might be an e)97 381.8 Q
(xample of a Group Responder)-.18 E(.)-.66 E(Appropriate beha)72 398.4 Q
(vior for a responder v)-.24 E(aries from one class to another)-.3 E 6
(.A)-.66 G(beha)-3 E(vior which)-.24 E
(might be appropriate from a Service Responder \(where the sender is e)
72 411.4 Q(xpecting an)-.18 E(automatic response\) might not be appropr\
iate from a Personal Responder)72 424.4 Q 6(.F)-.66 G(or e)-6.18 E
(xample, a)-.18 E(Service Responder might send a v)72 437.4 Q
(ery long response to a request, or one that is not in a)-.18 E
(human-readable format, according to the needs of that service.)72 450.4
Q(Ho)6 E(we)-.3 E -.18(ve)-.3 G 3(raP).18 G(ersonal)-3 E(Responder shou\
ld assume that a human being is reading the response and send only brie\
f)72 463.4 Q(responses in plain te)72 476.4 Q(xt.)-.18 E/F2 12
/Times-Bold@0 SF(1.2. Notation and De\214nitions)72 502.4 Q F0(The k)72
519 Q .36 -.18(ey w)-.12 H(ords "MUST", "MUST NO).06 E
(T", "SHOULD", "SHOULD NO)-.48 E(T",)-.48 E("RECOMMENDED", "NO)72 532 Q
3(TR)-.48 G(ECOMMENDED", and "MA)-3 E(Y" in this document are to be)
-1.26 E(interpreted as described in [N1.RFC2119].)72 545 Q(The term "su\
bject message" is used to refer to a message which causes a response to\
 be)72 561.6 Q(sent.)72 574.6 Q(The term "response" refers to a message\
 that is automatically issued on receipt of a)72 591.2 Q
(subject message by a responder)72 604.2 Q(.)-.66 E 3(A")72 620.8 S(res\
ponder" is a process that automatically responds to subject messages un\
der some)-3 E(well-de\214ned set of conditions.)72 633.8 Q 110.346
(Moore Automatic)72 697 R(E-Mail Responses)3 E([P)105.198 E(age 3])-.18
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/F0 12/Times-Roman@0 SF 287.712(Internet-Draft 1)72 49 R(October 2003)3
E(Unless speci\214ed otherwise, the term "recipient" refers to the emai\
l addresses to which a)72 85 Q(subject message w)72 98 Q(as deli)-.12 E
-.18(ve)-.3 G(red \(rather than, for instance, the address to which the)
.18 E(response w)72 111 Q(as sent\).)-.12 E 3(A")6 G
(recipient" address might be permanently associated with a)-3 E
(responder)72 124 Q 3(,o)-.48 G 3(ri)-3 G 3(tm)-3 G
(ight be the address of a human being whose mail is, under some)-3 E
(conditions, answered by a responder)72 137 Q(.)-.66 E/F1 12
/Times-Bold@0 SF(2. When \(not\) to send automatic r)72 163 Q(esponses)
-.216 E F0(An automatic responder MUST NO)72 179.6 Q 3(Ts)-.48 G
(end a response for e)-3 E -.18(ve)-.3 G(ry message recei).18 E -.18(ve)
-.3 G 3(d. In).18 F(practice there are al)72 192.6 Q -.12(wa)-.12 G
(ys reasons to refuse to respond to some kinds of recei).12 E -.18(ve)
-.3 G(d).18 E(messages, e.g. for loop pre)72 205.6 Q -.18(ve)-.3 G
(ntion, to a).18 E -.24(vo)-.24 G(id responding to "spam", to a).24 E
-.24(vo)-.24 G(id being used as).24 E 3(am)72 218.6 S
(eans to launder or amplify ab)-3 E(usi)-.24 E .36 -.18(ve m)-.3 H
(essages, to a).18 E -.24(vo)-.24 G(id inappropriately re).24 E -.18(ve)
-.3 G(aling).18 E(personal information about the recipient \(e.g. to a)
72 231.6 Q -.24(vo)-.24 G(id an automatic indication that a).24 E
(recipient has not read his mail recently\), and to thw)72 244.6 Q
(art denial-of-service attacks ag)-.12 E(ainst)-.06 E(the responder)72
257.6 Q 6(.T)-.66 G
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(ccording to the responder')-3 E 3(sp)-.66 G 3(urpose. In)-3 F
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(other than "no".)97 355.8 Q F2<83>72 372.4 Q F0(Personal and Group res\
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(nability to read or reply to the message \(e.g. "a)-3 E -.12(wa)-.18 G
3(yf).12 G(rom my mail" or)-3 E("too b)97 398.4 Q
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(ssue the same response to the same sender)-3 E
(more than once within a period of se)97 411.4 Q -.18(ve)-.3 G
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E -.18(ve)-.24 G(sent multiple messages.)97 424.4 Q 3(A7)6 G
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(Personal and Group responses whose purpose is to notify the sender of \
a message of)20.1 E 3(at)97 454 S
(emporary absence of the recipient \(e.g. "v)-3 E
(acation" and "out of the of)-.3 E(\214ce" notices\))-.3 E(SHOULD NO)97
467 Q 3(Tb)-.48 G 3(ei)-3 G(ssued unless a v)-3 E
(alid address for the recipient is e)-.3 E(xplicitly)-.18 E
(included in a recipient \(e.g. T)97 480 Q(o, Cc, Bcc, Resent-T)-.96 E
(o, Resent-Cc, or Resent-Bcc\) \214eld)-.96 E(of the subject message.)97
493 Q(Since a recipient may ha)6 E .36 -.18(ve m)-.24 H
(ultiple addresses forw).18 E(arded to)-.12 E(the same mailbox, recipie\
nts SHOULD be able to specify a set of addresses to the)97 506 Q
(responder which it will recognize as v)97 519 Q
(alid for that recipient.)-.3 E(Note: RFC 2822 section 3.6.3 permits v)
97 535.6 Q(arying uses of the Bcc \214eld, some of which)-.3 E -.12(wo)
97 548.6 S(uld allo).12 E 3(wt)-.3 G
(he sender of the subject message to e)-3 E
(xplicitly specify the recipient')-.18 E(s)-.66 E(address as a "Bcc" re\
cipient without a Bcc \214eld appearing in the message as)97 561.6 Q
(deli)97 574.6 Q -.18(ve)-.3 G
(red, or without the Bcc \214eld in the deli).18 E -.18(ve)-.3 G
(red message containing the).18 E(recipient')97 587.6 Q 3(sa)-.66 G 3
(ddress. Ho)-3 F(we)-.3 E -.18(ve)-.3 G .96 -.48(r, p).18 H
(erhaps because Bcc').48 E 3(sa)-.66 G(re rarely used, the heuristic of)
-3 E(not responding to messages for which the recipient w)97 600.6 Q
(as not e)-.12 E(xplicitly listed in a T)-.18 E(o,)-.96 E
(CC, or Bcc header \214eld has been found to w)97 613.6 Q
(ork well in practice.)-.12 E F2<83>72 630.2 Q F0
(Personal and Group Responders MA)20.1 E 3(Yr)-1.26 G
(efuse to generate responses e)-3 E(xcept to kno)-.18 E(wn)-.3 E
(correspondents or addresses of otherwise "trusted" indi)97 643.2 Q 3
(viduals. Such)-.3 F(responders)3 E(MA)97 656.2 Q 3(Ya)-1.26 G
(lso generate dif)-3 E
(ferent kinds of responses for "trusted" vs. "untrusted")-.3 E 110.346
(Moore Automatic)72 697 R(E-Mail Responses)3 E([P)105.198 E(age 4])-.18
E EP
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E 3(addresses. This)97 85 R(might be useful, for instance, to a)3 E -.24
(vo)-.24 G(id inappropriate disclosure of).24 E
(personal information to arbitrary addresses.)97 98 Q/F1 14
/Times-Roman@0 SF<83>72 114.6 Q F0(Responders MUST NO)20.1 E 3(Tg)-.48 G
(enerate an)-3 E 3(yr)-.18 G(esponse for which the destination of that)
-3 E(response w)97 127.6 Q
(ould be a null address \(e.g. an address for which SMTP MAIL FR)-.12 E
(OM or)-.48 E(Return-P)97 140.6 Q(ath is)-.18 E/F2 12/Courier@0 SF(<>)3
E F0(\), since the response w)A(ould not be deli)-.12 E -.18(ve)-.3 G
(red to a useful).18 E 3(destination. Responders)97 153.6 R(MA)3 E 3(Yr)
-1.26 G(efuse to generate responses for addresses commonly)-3 E(used as\
 return addresses by responders - e.g. those with local-parts matching)
97 166.6 Q(")97 179.6 Q F2(owner-*)A F0(", ")A F2(*-request)A F0(", ")A
F2(MAILER-DAEMON)A F0(", etc.)A(Responders are)6 E
(encouraged to check the destination address for v)97 192.6 Q
(alidity before generating the)-.3 E(response, to a)97 205.6 Q -.24(vo)
-.24 G(id generating responses that cannot be deli).24 E -.18(ve)-.3 G
(red or are unlik).18 E(ely to be)-.12 E(useful.)97 218.6 Q F1<83>72
235.2 Q F0(In order to a)20.1 E -.24(vo)-.24 G
(id responding to spam and to certain kinds of attacks, automatic).24 E
(responses from Service Responders SHOULD NO)97 248.2 Q 3(Tb)-.48 G 3
(es)-3 G(ent for e)-3 E(xtremely)-.18 E(malformed requests.)97 261.2 Q
(This may include checking that the subject message has a)6 E
(content-type and content appropriate to that service.)97 274.2 Q F1<83>
72 290.8 Q F0(Because the v)20.1 E
(ast majority of email is unauthenticated, and return addresses are)-.3
E(easily for)97 303.8 Q(ged, in order to a)-.216 E -.24(vo)-.24 G
(id being used as a means of denial-of-service attacks).24 E
(\(i.e. to \215ood mailbox)97 316.8 Q(es with unw)-.18 E
(anted content\) Service Responders SHOULD NO)-.12 E(T)-.48 E
(return lar)97 329.8 Q(ge responses \(say)-.216 E 3(,m)-.78 G
(ore than a fe)-3 E 3(wk)-.3 G(ilobytes\) without speci\214c kno)-3 E
(wledge)-.3 E(that the request w)97 342.8 Q
(as actually authorized by the party associated with the address to)-.12
E(which the response will be sent.)97 355.8 Q(Similarly)6 E 3(,S)-.78 G
(ervice Responders SHOULD NO)-3 E(T)-.48 E(cause unw)97 368.8 Q
(anted side-ef)-.12 E
(fects \(such as subscribing the sender to a mailing list\))-.3 E
(without reasonable assurance that the request w)97 381.8 Q
(as authorized by the af)-.12 E(fected party)-.3 E(.)-.78 E(NO)97 398.4
Q(TE: Since each responder has a dif)-.48 E(ferent purpose and a dif)-.3
E(ferent set of potential)-.3 E
(threats to which it might be subjected, whether an)97 411.4 Q 3(yp)-.18
G(articular means of authentica-)-3 E(tion is appropriate for a particu\
lar responder is not in scope for this document.)97 424.4 Q F1<83>72 441
Q F0 3(Ar)20.1 G(esponder MA)-3 E 3(Yr)-1.26 G
(efuse to send a response to a subject message which contains)-3 E(an)97
454 Q 3(yh)-.18 G(eader or content which mak)-3 E
(es it appear to the responder that a response w)-.12 E(ould)-.12 E
(not be appropriate.)97 467 Q -.18(Fo)6 G 3(ri).18 G
(nstance, if the subject message contained a Precedence)-3 E
(header \214eld [I4.RFC2076] with a v)97 480 Q
(alue of "list" the responder might guess that the)-.3 E(traf)97 493 Q
(\214c had arri)-.3 E -.18(ve)-.3 G 3(df).18 G
(rom a mailing list, and w)-3 E(ould not respond if the response were)
-.12 E(only intended for personal messages.)97 506 Q -.18(Fo)6 G 3(rs)
.18 G(imilar reasons, a responder MA)-3 E 3(Yi)-1.26 G(gnore)-3 E(an)97
519 Q 3(ys)-.18 G(ubject message with a List-* \214eld [I5.RFC2369].)-3
E(\(Because Precedence is not a)6 E
(standard header \214eld, and its use and interpretation v)97 532 Q
(ary widely in the wild, no)-.3 E(particular responder beha)97 545 Q
(vior in the presence of Precedence is recommended by this)-.24 E
(speci\214cation.\))97 558 Q/F3 12/Times-Bold@0 SF(3. F)72 584 Q
(ormat of automatic r)-.3 E(esponses)-.216 E F0(The follo)72 600.6 Q(wi\
ng sections specify details of the contents of automatic responses, inc\
luding)-.3 E(the header of the response message, the content of the res\
ponse, and the en)72 613.6 Q -.18(ve)-.48 G(lope in).18 E
(which the response is transmitted to the email transport system.)72
626.6 Q 110.346(Moore Automatic)72 697 R(E-Mail Responses)3 E([P)105.198
E(age 5])-.18 E EP
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/F0 12/Times-Roman@0 SF 287.712(Internet-Draft 1)72 49 R(October 2003)3
E/F1 12/Times-Bold@0 SF(3.1 Message header)72 85 Q F0
(The \214elds in the message header should be set as follo)72 101.6 Q
(ws:)-.3 E F1(3.1.1 Fr)72 127.6 Q(om \214eld)-.216 E F0
(In correspondence between humans, the From \214eld serv)72 144.2 Q
(es multiple purposes: It identi\214es)-.18 E(the author of the message\
 \(or in some cases, the party or parties on whose behalf the)72 157.2 Q
(message w)72 170.2 Q(as sent\), and it is the def)-.12 E
(ault destination of replies from humans.)-.12 E(Unfortunately)72 183.2
Q 3(,s)-.78 G(ome mail systems still send nondeli)-3 E -.18(ve)-.3 G
(ry reports and other kinds of).18 E
(automatic responses to the From address.)72 196.2 Q -.18(Fo)72 212.8 S
3(ra).18 G(utomatic responses, the role of the From \214eld in determin\
ing the destination of)-3 E(replies to the response from humans is less\
 signi\214cant, because in most cases it is not)72 225.8 Q
(useful or appropriate for a human \(or an)72 238.8 Q
(yone\) to reply to an automatic response.)-.18 E(One)6 E -.18(ex)72
251.8 S(ception is when there is some problem with the response; it sho\
uld be possible to).18 E(pro)72 264.8 Q
(vide feedback to the person operating the responder)-.18 E(.)-.66 E(So\
 in most cases the From address in an automatic response needs to be ch\
osen according)72 281.4 Q(to the follo)72 294.4 Q(wing criteria:)-.3 E
/F2 14/Times-Roman@0 SF<83>72 311 Q F0 1.92 -.96(To p)20.1 H(ro).96 E(v\
ide an indication of the party or agent on whose behalf the response w)
-.18 E(as)-.12 E(sent,)97 324 Q F2<83>72 340.6 Q F0 1.92 -.96(To p)20.1
H(ro).96 E(vide an address to which a recipient of an inappropriate res\
ponse can request)-.18 E(that the situation be corrected, and)97 353.6 Q
F2<83>72 370.2 Q F0 1.92 -.96(To d)20.1 H
(iminish the potential for mail loops.).96 E(The follo)72 386.8 Q
(wing beha)-.3 E(vior is thus recommended:)-.24 E F2<83>72 403.4 Q F0
-.18(Fo)20.1 G 3(rr).18 G(esponses sent by Service Responders, the From\
 \214eld SHOULD contain an)-3 E(address which can be used to reach the \
\(human\) maintainer of that service.)97 416.4 Q(The)6 E(human-readable\
 portion of the From \214eld \(the display-name preceding the address\))
97 429.4 Q(SHOULD contain a name or description of the service to ident\
ify the service to)97 442.4 Q(humans.)97 455.4 Q F2<83>72 472 Q F0 -.18
(Fo)20.1 G 3(rr).18 G(esponses sent by Personal Responders, the From \
\214eld SHOULD contain the)-3 E(name of the recipient and an address ch\
osen by the recipient to be recognizable to)97 485 Q
(correspondents. Often this will be the same address that w)97 498 Q
(as used to send the subject)-.12 E(message to that recipient.)97 511 Q
(In the case of a recipient ha)97 527.6 Q
(ving multiple mail addresses forw)-.24 E(arded to the same)-.12 E
(mailbox \(and responder\), a Personal Responder MA)97 540.6 Q 3(Yu)
-1.26 G(se heuristics to guess, based)-3 E(on the information a)97 553.6
Q -.3(va)-.24 G(ilable in v).3 E
(arious message header \214elds, which of se)-.3 E -.18(ve)-.3 G(ral).18
E(addresses for that recipient the sender is lik)97 566.6 Q(ely to ha)
-.12 E .36 -.18(ve u)-.24 H(sed, and use that address in).18 E
(the From \214eld of the response.)97 579.6 Q(Ho)6 E(we)-.3 E -.18(ve)
-.3 G 3(ri).18 G 3(tM)-3 G(UST be possible for a recipient on)-3 E
(whose behalf the responder is acting to e)97 592.6 Q
(xplicitly specify the human-readable name)-.18 E
(and address to be used in the From header \214elds of responses.)97
605.6 Q(Note: Due to pri)97 622.2 Q -.3(va)-.3 G .36 -.18(cy r).3 H
(easons it may be inappropriate for responders to disclose an).18 E
(address that is deri)97 635.2 Q -.18(ve)-.3 G(d, say).18 E 3(,f)-.78 G
(rom the recipient')-3 E 3(sl)-.66 G(ogin information \(e.g. POP or)-3 E
(IMAP user name or account name on a multiuser computer\) or which disc\
loses the)97 648.2 Q 110.346(Moore Automatic)72 697 R(E-Mail Responses)3
E([P)105.198 E(age 6])-.18 E EP
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E(speci\214c name of the computer where the response w)97 85 Q
(as generated.)-.12 E(Furthermore)6 E
(these do not necessarily produce a v)97 98 Q
(alid public email address for the recipient.)-.3 E -.18(Fo)6 G(r).18 E
(this reason the From \214eld of a Personal Response MUST be settable b\
y the recipient)97 111 Q(on whose behalf the responder is acting.)97 124
Q/F1 14/Times-Roman@0 SF<83>72 140.6 Q F0 -.18(Fo)20.1 G 3(rG).18 G(rou\
p Responders, the From address SHOULD contain an email address which)-3
E(could be used to reach the maintainer of that Group Responder)97 153.6
Q 6(.U)-.66 G(se of the)-6 E(Postmaster address for this purpose is NO)
97 166.6 Q 3(TR)-.48 G(ECOMMENDED.)-3 E(The human-readable portion of t\
he From address \(the "phrase" before the address,)97 183.2 Q(see [N2.R\
FC2822], section 3.2.6\) SHOULD contain an indication of the function)97
196.2 Q(performed by the Group Responder and on whose behalf it operate\
s \(e.g. "Example)97 209.2 Q(Agenc)97 222.2 Q 3(yv)-.18 G
(irus \214lter"\))-3 E/F2 12/Times-Bold@0 SF(3.1.2 Reply-T)72 248.2 Q 3
<6f8c>-1.104 G(eld)-3 E F0(If a reply is e)72 264.8 Q
(xpected by the responder)-.18 E 3(,t)-.48 G(he Reply-T)-3 E 3<6f8c>-.96
G(eld of the response SHOULD be)-3 E
(set to the address at which the reply is e)72 277.8 Q(xpected, e)-.18 E
-.18(ve)-.3 G 3(ni).18 G 3(ft)-3 G(his is the address of the same or)-3
E(another responder)72 290.8 Q 6(.R)-.66 G
(esponders which request replies to be sent to responders MUST)-6 E(pre)
72 303.8 Q -.18(ve)-.3 G(nt mail loops and sorcerer').18 E 3(sa)-.66 G
(pprentice mode.)-3 E(Note that since \(according to the)6 E(pre)72
316.8 Q(vious section\) the From \214eld of the response SHOULD contain\
 the address of a)-.3 E(human, if the Reply-T)72 329.8 Q 3<6f8c>-.96 G
(eld of the response is used to direct replies to a responder it will)-3
E(not be the same as the address in the From \214eld.)72 342.8 Q
(Discussion: this assumes that the human recipient')72 359.4 Q 3(su)-.66
G(ser agent will normally send replies)-3 E(to the Reply-T)72 372.4 Q 3
(oa)-.96 G
(ddress \(if present\), as recommended by [I6.RFC822] since 1982, b)-3 E
(ut)-.24 E(that it is still possible for a recipient to reply to the Fr\
om address if he or she \214nds it)72 385.4 Q(useful to do so.)72 398.4
Q(This is consistent with the intended use of these \214elds in [I6.RFC\
822])6 E(and [N2.RFC2822].)72 411.4 Q F2(3.1.3 T)72 437.4 Q 3<6f8c>
-1.104 G(eld)-3 E F0(The T)72 454 Q 3(oh)-.96 G
(eader \214eld SHOULD indicate the recipient of the response.)-3 E
(In general there)6 E(SHOULD only be one recipient of an)72 467 Q 3(ya)
-.18 G(utomatic response.)-3 E(This minimizes the potential)6 E
(for sorcerer')72 480 Q 3(sa)-.66 G
(pprentice mode and denial-of-service attacks.)-3 E F2
(3.1.4 Date \214eld)72 506 Q F0(The Date header \214eld SHOULD indicate\
 the date and time at which the response w)72 522.6 Q(as)-.12 E 6
(generated. This)72 535.6 R(MUST NO)3 E 3(Tb)-.48 G 3(et)-3 G(ak)-3 E
(en as an)-.12 E 3(yi)-.18 G(ndication of the deli)-3 E -.18(ve)-.3 G
(ry date of the).18 E
(subject message, nor of the time at which the response w)72 548.6 Q
(as sent.)-.12 E F2(3.1.5 Subject \214eld)72 574.6 Q F0(The Subject \
\214eld SHOULD contain a brief indication that the message is an automa\
tic)72 591.2 Q(response, follo)72 604.2 Q(wed by contents of the Subjec\
t \214eld \(or a portion thereof\) from the subject)-.3 E 3
(message. The)72 617.2 R(pre\214x "Auto:" MA)3 E 3(Yb)-1.26 G 3(eu)-3 G
(sed as such an indication.)-3 E(If used, this pre\214x)6 E
(SHOULD be follo)72 630.2 Q(wed by an ASCII SP)-.3 E -.48(AC)-1.104 G 3
(Ec).48 G(haracter \(0x20\).)-3 E(NO)72 646.8 Q
(TE: Just as the \(Latin-deri)-.48 E -.18(ve)-.3 G
(d\) pre\214x "Re:" that is commonly used to indicate human-).18 E(gene\
rated responses is sometimes translated to other languages by mail user\
 agents, or)72 659.8 Q 110.346(Moore Automatic)72 697 R
(E-Mail Responses)3 E([P)105.198 E(age 7])-.18 E EP
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E(otherwise interpreted by mail user agents as indication that the mess\
age is a reply)72 85 Q 3(,s)-.78 G 3(ot)-3 G(he)-3 E(\(Greek\) pre\214x\
 "Auto:" may also be translated or used as a generic indication that th\
e)72 98 Q(message is an automatic response.)72 111 Q(Ho)6 E(we)-.3 E
-.18(ve)-.3 G 3(rt).18 G(he "Auto:" indication is intended only as an)-3
E(aid to humans in processing the message.)72 124 Q
(Mail processing softw)6 E(are SHOULD NO)-.12 E(T)-.48 E
(assume that the presence of "Auto:" at the be)72 137 Q
(ginning of a Subject \214eld is an indication)-.18 E
(that the message w)72 150 Q(as automatically submitted.)-.12 E(Note th\
at the Subject \214eld of the subject message may contain encoded-w)72
166.6 Q(ords formatted)-.12 E
(according to [N3.RFC2047] and [n3.5], and such te)72 179.6 Q(xt MA)-.18
E 3(Yb)-1.26 G 3(ei)-3 G(ncluded in the Subject)-3 E
(\214eld of a response.)72 192.6 Q(In generating responses containing s\
uch \214elds there is rarely a need)6 E(to decode and re-encode such te)
72 205.6 Q 3(xt. It)-.18 F(is usually suf)3 E(\214cient to lea)-.3 E .36
-.18(ve t)-.24 H(hose encoded-w).18 E(ords)-.12 E(as the)72 218.6 Q 3
(yw)-.18 G(ere in the subject message, merely prepending "Auto:)-3 E 3
("o)6 G 3(ro)-3 G(ther indication.)-3 E(Ho)72 231.6 Q(we)-.3 E -.18(ve)
-.3 G .96 -.48(r, i).18 H 3(ti).48 G 3(ss)-3 G(till necessary to ensure\
 that no line in the resulting Subject \214eld that)-3 E
(contains an encoded-w)72 244.6 Q
(ord is greater than 76 ASCII characters in length \(this refers to the)
-.12 E(encoded form, not the number of characters in the te)72 257.6 Q
(xt being encoded\).)-.18 E(Also, if the)6 E(responder truncates the Su\
bject from the subject message it is necessary to a)72 270.6 Q -.24(vo)
-.24 G(id).24 E(truncating Subject te)72 283.6 Q
(xt in the middle of an encoded-w)-.18 E(ord.)-.12 E/F1 12/Times-Bold@0
SF(3.1.6 In-Reply-T)72 309.6 Q 3(oa)-1.104 G(nd Refer)-3 E
(ences \214elds)-.216 E F0(The In-Reply-T)72 326.2 Q 3(oa)-.96 G
(nd References \214elds SHOULD be pro)-3 E
(vided in the header of a response)-.18 E(message if there w)72 339.2 Q
(as a Message-ID \214eld in the subject message, according to the rules\
 in)-.12 E([N2.RFC2822] section 3.6.4.)72 352.2 Q F1(3.1.7 A)72 378.2 Q
(uto-Submitted \214eld)-.6 E F0(The Auto-Submitted \214eld, with a v)72
394.8 Q(alue of "auto-replied", SHOULD be included in the)-.3 E
(message header of an)72 407.8 Q 3(ya)-.18 G(utomatic response.)-3 E
(See section 5.)6 E F1(3.1.8 Pr)72 433.8 Q(ecedence \214eld)-.216 E F0 3
(Ar)72 450.4 S(esponse MA)-3 E 3(Yi)-1.26 G
(nclude a Precedence \214eld [I4.RFC2076] in order to discourage)-3 E(r\
esponses from some kinds of responders which predate this speci\214cati\
on.)72 463.4 Q(The \214eld-)6 E(body of the Precedence \214eld MA)72
476.4 Q 3(Yc)-1.26 G(onsist of the te)-3 E(xt "junk", "list", "b)-.18 E
(ulk", or other te)-.24 E(xt)-.18 E(deemed appropriate by the responder)
72 489.4 Q 6(.B)-.66 G
(ecause the Precedence \214eld is non-standard and)-6 E
(its interpretation v)72 502.4 Q(aries widely)-.3 E 3(,t)-.78 G
(he use of Precedence is not speci\214cally recommended by)-3 E
(this speci\214cation, nor does this speci\214cation recommend an)72
515.4 Q 3(yp)-.18 G(articular v)-3 E(alue for that)-.3 E(\214eld.)72
528.4 Q F1(3.2 Message content)72 554.4 Q F0(In general, messages sent \
by Personal or Group Responders SHOULD be brief, and in)72 571 Q(te)72
584 Q(xt/plain format.)-.18 E 3(Am)6 G(ultipart/alternati)-3 E .36 -.18
(ve c)-.3 H(onstruct MA).18 E 3(Yb)-1.26 G 3(eu)-3 G(sed to communicate)
-3 E(responses in multiple languages, especially if in doing so it is d\
esirable to use multiple)72 597 Q(charsets.)72 610 Q
(Response messages SHOULD NO)72 626.6 Q 3(Ti)-.48 G
(nclude signi\214cant content from the subject message.)-3 E
(In particular)72 639.6 Q 3(,P)-.48 G
(ersonal and Group responses SHOULD NO)-3 E 3(Tc)-.48 G(ontain non-te)-3
E(xt content)-.18 E(from the subject message, and the)72 652.6 Q 3(yS)
-.18 G(HOULD NO)-3 E 3(Ti)-.48 G(nclude attachments from the subject)-3
E 110.346(Moore Automatic)72 697 R(E-Mail Responses)3 E([P)105.198 E
(age 8])-.18 E EP
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E 3(message. Neither)72 85 R
(of these conditions applies to responders that speci\214cally e)3 E
(xist for the)-.18 E(purpose of altering or translating content sent to\
 them \(for instance, a FOR)72 98 Q(TRAN-to-C)-.72 E(translator\); ho)72
111 Q(we)-.3 E -.18(ve)-.3 G .96 -.48(r, s).18 H
(uch responders MUST emplo).48 E 3(ym)-.12 G(easures to a)-3 E -.24(vo)
-.24 G(id being used as a).24 E(means of laundering or forw)72 124 Q
(arding undesirable content, such as spam or viruses.)-.12 E
(Note that when te)72 140.6 Q
(xt from the Subject or other \214elds from the header of the subject)
-.18 E(message is included in the body of the response, it is necessary\
 to decode an)72 153.6 Q 3(ye)-.18 G(ncoded-)-3 E -.12(wo)72 166.6 S(rd\
s that appeared in those \214elds before including in the message body)
.12 E 3(,a)-.78 G(nd to use an)-3 E
(appropriate content-type, charset, and content-transfer)72 179.6 Q 3
(-encoding. In)-.24 F(some cases it may be)3 E
(necessary to transliterate te)72 192.6 Q
(xt from the charset\(s\) used in the header of the subject)-.18 E
(message, to the charset\(s\) used in the body of the response.)72 205.6
Q(\(It is much easier to)6 E(implement a responder if te)72 218.6 Q
(xt from the header of the subject message ne)-.18 E -.18(ve)-.3 G 3(rn)
.18 G(eeds to)-3 E(appear in the body of the response.\))72 231.6 Q/F1
12/Times-Bold@0 SF
(3.2.1 Use of DSNs and MDNs instead of this speci\214cation)72 257.6 Q
F0(In general, it is appropriate to use Deli)72 274.2 Q -.18(ve)-.3 G
(ry Status Noti\214cations \(DSNs\) for responses that).18 E(are genera\
ted by the mail transport system as a result of attempts to relay)72
287.2 Q 3(,f)-.78 G(orw)-3 E(ard, or)-.12 E(deli)72 300.2 Q -.18(ve)-.3
G 3(rm).18 G(ail, and only when the purpose of that response is to pro)
-3 E(vide the sender of the)-.18 E
(subject message with information about the status of that mail deli)72
313.2 Q -.18(ve)-.3 G(ry).18 E 6(.F)-.78 G(or instance, a)-6.18 E
("virus scanner" which is acti)72 326.2 Q -.3(va)-.3 G
(ted by a mail deli).3 E -.18(ve)-.3 G
(ry process to \214lter harmful content).18 E(prior to deli)72 339.2 Q
-.18(ve)-.3 G(ry).18 E 3(,c)-.78 G
(ould return a DSN with the Action \214eld set to "f)-3 E
(ailed" with a Status)-.12 E(code of 5.7.1 \(Deli)72 352.2 Q -.18(ve)-.3
G(ry not authorized, message refused\) if the entire message w).18 E
(as not)-.12 E(deli)72 365.2 Q -.18(ve)-.3 G(red due to security reason\
s; or it could return a DSN with the Action \214eld set to).18 E
("relayed" or "deli)72 378.2 Q -.18(ve)-.3 G
(red" \(as appropriate\) with a Status code set to 2.6.4 \(con).18 E
-.18(ve)-.48 G(rsion with).18 E(loss performed\) if the message w)72
391.2 Q(as relayed or deli)-.12 E -.18(ve)-.3 G
(red with the presumably harmful).18 E(content remo)72 404.2 Q -.18(ve)
-.18 G 3(d. The).18 F
(DSN speci\214cation [I2.RFC3464], rather than this document,)3 E(go)72
417.2 Q -.18(ve)-.18 G(rns the generation and format of DSNs.).18 E
(Similarly)72 433.8 Q 3(,i)-.78 G 3(ti)-3 G 3(sa)-3 G(ppropriate to use\
 Message Disposition Noti\214cations \(MDNs\) only for)-3 E
(responses generated on the recipient')72 446.8 Q 3(sb)-.66 G
(ehalf, which are generated on or after deli)-3 E -.18(ve)-.3 G(ry to)
.18 E 3(ar)72 459.8 S(ecipient')-3 E 3(sm)-.66 G
(ailbox, and for which the purpose of the response is to indicate the)-3
E(disposition of the message.)72 472.8 Q
(The MDN speci\214cation [I3.RFC2298], rather than this)6 E
(document, go)72 485.8 Q -.18(ve)-.18 G
(rns the generation and format of MDNs.).18 E(This document is not inte\
nded to alter either the DSN or MDN speci\214cations.)72 502.4 Q
(Responses)6 E(that \214t within the criteria of DSN or MDN, as de\214n\
ed by the respecti)72 515.4 Q .36 -.18(ve s)-.3 H(peci\214cations,).18 E
(should be generated according to the DSN or MDN speci\214cation rather\
 than this)72 528.4 Q 3(document. Responses)72 541.4 R
(which do not \214t one of these sets of criteria should be generated)3
E(according to this document.)72 554.4 Q F1(3.3 Message en)72 580.4 Q
-.12(ve)-.48 G(lope).12 E F0(The SMTP MAIL FR)72 597 Q
(OM address, or other en)-.48 E -.18(ve)-.48 G
(lope return address used to send the).18 E
(message, SHOULD be chosen in such a w)72 610 Q(ay as to mak)-.12 E 3
(em)-.12 G(ail loops unlik)-3 E(ely)-.12 E 6(.A)-.78 G(loop)-3 E
(might occur)72 623 Q 3(,f)-.48 G
(or instance, if both sender and recipient of a message each ha)-3 E .36
-.18(ve a)-.24 H(utomatic).18 E(responders - the recipient')72 636 Q 3
(sr)-.66 G(esponder sends mail to the sender')-3 E 3(sr)-.66 G(esponder)
-3 E 3(,w)-.48 G(hich sends)-3 E(mail back to the recipient')72 649 Q 3
(sr)-.66 G(esponder)-3 E(.)-.66 E 110.346(Moore Automatic)72 697 R
(E-Mail Responses)3 E([P)105.198 E(age 9])-.18 E EP
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/F0 12/Times-Roman@0 SF 287.712(Internet-Draft 1)72 49 R(October 2003)3
E(The primary purpose of the MAIL FR)72 85 Q(OM address is to serv)-.48
E 3(ea)-.18 G 3(st)-3 G(he destination for)-3 E(deli)72 98 Q -.18(ve)-.3
G(ry status messages and other automatic responses.).18 E
(Since in most cases it is not)6 E(appropriate to respond to an automat\
ic response, and the responder is not interested in)72 111 Q(deli)72 124
Q -.18(ve)-.3 G(ry status messages, a MAIL FR).18 E(OM address of <> MA)
-.48 E 3(Yb)-1.26 G 3(eu)-3 G(sed for this purpose.)-3 E 3(AM)72 137 S
(AIL FR)-3 E
(OM address which is speci\214cally chosen for the purpose of sending)
-.48 E
(automatic responses, and which will not automatically respond to an)72
150 Q 3(ym)-.18 G(essage sent to it,)-3 E(MA)72 163 Q 3(Yb)-1.26 G 3(eu)
-3 G(sed instead of <>.)-3 E(The RCPT T)72 179.6 Q 3(Oa)-.216 G(ddress \
will \(of course\) be the address of the intended recipient of the)-3 E
3(response. It)72 192.6 R(is RECOMMENDED that the NO)3 E
(TIFY=NEVER parameter of the RCPT)-.48 E
(command be speci\214ed if the SMTP serv)72 205.6 Q
(er supports the DSN option [N5.RFC2003].)-.18 E/F1 12/Times-Bold@0 SF
(4. Wher)72 231.6 Q 3(et)-.216 G 3(os)-3 G(end automatic r)-3 E
(esponses \(and wher)-.216 E 3(en)-.216 G(ot to send them\))-3 E F0
(In general, automatic responses SHOULD be sent to the Return-P)72 248.2
Q(ath \214eld if generated)-.18 E(after deli)72 261.2 Q -.18(ve)-.3 G
(ry).18 E 6(.I)-.78 G 3(ft)-6 G(he response is generated prior to deli)
-3 E -.18(ve)-.3 G(ry).18 E 3(,t)-.78 G(he response SHOULD be)-3 E
(sent to the re)72 274.2 Q -.18(ve)-.3 G(rse-path from the SMTP MAIL FR)
.18 E(OM command, or \(in a non-SMTP)-.48 E(system\) to the en)72 287.2
Q -.18(ve)-.48 G(lope return address which serv).18 E
(es as the destination for nondeli)-.18 E -.18(ve)-.3 G(ry).18 E
(reports.)72 300.2 Q(If the response is to be generated after deli)72
316.8 Q -.18(ve)-.3 G(ry).18 E 3(,a)-.78 G(nd there is no Return-P)-3 E
(ath \214eld in the)-.18 E
(subject message, there is an implementation error in the SMTP serv)72
329.8 Q(er that deli)-.18 E -.18(ve)-.3 G(red the).18 E
(message, or that SMTP serv)72 342.8 Q(er is improperly con\214gured.)
-.18 E 3(AP)6 G(ersonal or Group responder)-3 E(SHOULD NO)72 355.8 Q 3
(Td)-.48 G(eli)-3 E -.18(ve)-.3 G 3(rar).18 G(esponse to an)-3 E 3(ya)
-.18 G(ddress other than that in the Return-P)-3 E(ath \214eld,)-.18 E
-2.58 -.3(ev e)72 368.8 T 3(ni).3 G 3(ft)-3 G(he Return-P)-3 E
(ath \214eld is missing.)-.18 E
(It is better to \214x the problem with the mail)6 E(deli)72 381.8 Q
-.18(ve)-.3 G(ry system than to rely on heuristics to guess the appropr\
iate destination of the).18 E 3(response. Such)72 394.8 R(heuristics ha)
3 E .36 -.18(ve b)-.24 H(een kno).18 E
(wn to cause problems in the past.)-.3 E 3(AS)72 411.4 S
(ervice Responder MA)-3 E 3(Yd)-1.26 G(eli)-3 E -.18(ve)-.3 G 3(rt).18 G
(he response to the address\(es\) from the From \214eld, or)-3 E
(to another address from the request payload, pro)72 424.4 Q
(vided this beha)-.18 E(vior is precisely de\214ned in)-.24 E
(the speci\214cation for that service.)72 437.4 Q
(Services responders SHOULD NO)6 E 3(Tu)-.48 G(se the Reply-T)-3 E(o)
-.96 E(\214eld for this purpose.)72 450.4 Q(The Reply-T)72 467 Q 3<6f8c>
-.96 G(eld SHOULD NO)-3 E 3(Tb)-.48 G 3(eu)-3 G
(sed as the destination for automatic responses)-3 E
(from Personal or Group Responders.)72 480 Q
(In general, this \214eld is set by a human sender based)6 E
(on his/her anticipation of ho)72 493 Q 3(wh)-.3 G
(uman recipients will respond to the speci\214c content of)-3 E
(that message. F)72 506 Q(or instance, a human sender may use Reply-T)
-.18 E 3(ot)-.96 G 3(or)-3 G(equest that replies be)-3 E
(sent to an entire mailing list.)72 519 Q(Ev)6 E
(en for replies from humans, there are cases where it is)-.18 E
(not appropriate to respond to the Reply-T)72 532 Q 3(oa)-.96 G
(ddress, especially if the sender has ask)-3 E(ed that)-.12 E
(replies be sent to a group and/or mailing list.)72 545 Q
(Since a Personal or Group Responder)6 E
(operates on behalf of a human recipient, it is safer to assume that an)
72 558 Q 3(yR)-.18 G(eply-T)-3 E 3<6f8c>-.96 G(eld)-3 E
(present in the message w)72 571 Q
(as set by a human sender on the assumption that an)-.12 E 3(yr)-.18 G
(eply w)-3 E(ould)-.12 E(come from a human who had some understanding o\
f the roles of the sender and other)72 584 Q 3(recipients. An)72 597 R(\
automatic responder lacks the information necessary to understand those)
3 E 3(roles. Sending)72 610 R(automatic responses to Reply-T)3 E 3(oa)
-.96 G(ddresses can thus result in a lar)-3 E(ge)-.216 E
(number of people recei)72 623 Q(ving a useless or unw)-.3 E
(anted message; it can also contrib)-.12 E(ute to mail)-.24 E(loops.)72
636 Q 110.346(Moore Automatic)72 697 R(E-Mail Responses)3 E([P)99.198 E
(age 10])-.18 E EP
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E(Use of the From \214eld as the destination for automatic responses ha\
s some of the same)72 85 Q(problems as use of Reply-T)72 98 Q 3(o. In)
-.96 F(particular)3 E 3(,t)-.48 G
(he From \214eld may list multiple addresses,)-3 E
(while automatic responses should only be sent to a single address.)72
111 Q(In general, the From)6 E(and Reply-T)72 124 Q 3(oa)-.96 G
(ddresses are used in a v)-3 E(ariety of w)-.3 E(ays according to dif)
-.12 E(fering)-.3 E(circumstances, and for this reason Personal or Grou\
p Responders cannot reliably assume)72 137 Q
(that an address in the From or Reply-T)72 150 Q 3<6f8c>-.96 G
(eld is an appropriate destination for the)-3 E 3(response. F)72 163 R
(or these reasons the From \214eld SHOULD NO)-.18 E 3(Tb)-.48 G 3(eu)-3
G(sed as a destination for)-3 E(automatic responses.)72 176 Q(Similarly)
72 192.6 Q 3(,t)-.78 G(he Sender \214eld SHOULD NO)-3 E 3(Tb)-.48 G 3
(eu)-3 G(sed as the destination for automatic)-3 E 3(responses. This)72
205.6 R(\214eld is intended only to identify the person or entity that \
sent the)3 E
(message, and is not required to contain an address that is v)72 218.6 Q
(alid for replies.)-.3 E(The Return-P)72 235.2 Q
(ath address is really the only one from the message header that can be)
-.18 E -.18(ex)72 248.2 S(pected, as a matter of protocol, to be suitab\
le for automatic responses that were not).18 E
(anticipated by the sender)72 261.2 Q(.)-.66 E/F1 12/Times-Bold@0 SF
(5. The A)72 287.2 Q(uto-Submitted header \214eld)-.6 E F0(The purpose \
of the Auto-Submitted header \214eld is to indicate that the message w)
72 303.8 Q(as)-.12 E
(originated by an automatic process, or an automatic responder)72 316.8
Q 3(,r)-.48 G(ather than by a human;)-3 E(and to f)72 329.8 Q(acilitate\
 automatic \214ltering of messages from signal paths for which automati\
cally)-.12 E
(generated messages and automatic responses are not desirable.)72 342.8
Q F1(5.1 Syntax)72 368.8 Q F0(The syntax of Auto-Submitted is as follo)
72 385.4 Q(ws, using the ABNF notation of [N6.RFC2234]:)-.3 E/F2 12
/Courier@0 SF 28.8(auto-submitted-field =)72 404.4 R
("Auto-Submitted:" [CFWS])7.2 E(auto-submitted [CFWS] CRLF)266.4 417.4 Q
72(auto-submitted =)72 443.4 R 7.2(\(")7.2 G(no" / "auto-generated" /)
-7.2 E("auto-replied" / extension \))266.4 456.4 Q(opt-parameter-list)
266.4 469.4 Q 108(extension =)72 495.4 R(token)7.2 E 43.2
(opt-parameter-list =)72 521.4 R(*\( [CFWS] ";" [CFWS] parameter \))7.2
E F0(The symbols "CFWS" and "CRLF" are de\214ned in [N2.RFC2822].)72
553.4 Q(The symbols "tok)6 E(en",)-.12 E(and "parameter" are as de\214n\
ed in [N7.RFC2045] \(as amended by [N4.RFC2231]\).)72 566.4 Q(The maxim\
um number of Auto-Submitted \214elds that may appear in a message heade\
r is)72 583 Q(1.)72 596 Q F1(5.2 Semantics)72 622 Q F0
(The Auto-Submitted header \214eld SHOULD NO)72 638.6 Q 3(Tb)-.48 G 3
(es)-3 G(upplied for messages that were)-3 E
(manually submitted by a human.)72 651.6 Q(\(Ho)6 E(we)-.3 E -.18(ve)-.3
G .96 -.48(r, u).18 H(ser agents that allo).48 E 3(ws)-.3 G
(enders to specify)-3 E 110.346(Moore Automatic)72 697 R
(E-Mail Responses)3 E([P)99.198 E(age 11])-.18 E EP
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/F0 12/Times-Roman@0 SF 287.712(Internet-Draft 1)72 49 R(October 2003)3
E(arbitrary \214elds SHOULD NO)72 85 Q 3(Tp)-.48 G(re)-3 E -.18(ve)-.3 G
(nt humans from setting the Auto-Submitted \214eld,).18 E
(because it is sometimes useful for testing.\))72 98 Q
(The auto-generated k)72 114.6 Q -.18(ey)-.12 G -.12(wo).18 G(rd:).12 E
/F1 14/Times-Roman@0 SF<83>72 131.2 Q F0(SHOULD be used on messages gen\
erated by automatic \(often periodic\) processes)20.1 E(\(such as UNIX \
"cron jobs"\) which are not direct responses to other messages,)97 144.2
Q F1<83>72 160.8 Q F0(MUST NO)20.1 E 3(Tb)-.48 G 3(eu)-3 G
(sed on manually generated messages,)-3 E F1<83>72 177.4 Q F0(MUST NO)
20.1 E 3(Tb)-.48 G 3(eu)-3 G
(sed on a message issued in direct response to another message.)-3 E
(The auto-replied k)72 194 Q -.18(ey)-.12 G -.12(wo).18 G(rd:).12 E F1
<83>72 210.6 Q F0
(SHOULD be used on messages sent in direct response to another message,)
20.1 E F1<83>72 227.2 Q F0(MUST NO)20.1 E 3(Tb)-.48 G 3(eu)-3 G
(sed on manually-generated messages,)-3 E F1<83>72 243.8 Q F0(MUST NO)
20.1 E 3(Tb)-.48 G 3(eu)-3 G
(sed on messages generated by automatic or periodic processes,)-3 E -.18
(ex)97 256.8 S
(cept for messages which are automatic responses to other messages.).18
E(The "no" k)72 273.4 Q -.18(ey)-.12 G -.12(wo).18 G(rd MA).12 E 3(Yb)
-1.26 G 3(eu)-3 G(sed to e)-3 E(xplicitly indicate that a message w)-.18
E(as originated by a)-.12 E
(human, if for some reason this is found to be appropriate.)72 286.4 Q
(Extension k)72 303 Q -.18(ey)-.12 G -.12(wo).18 G
(rds may be de\214ned in the future, though it seems unlik).12 E(ely)
-.12 E 6(.T)-.78 G(he syntax)-6 E(and semantics of such k)72 316 Q -.18
(ey)-.12 G -.12(wo).18 G(rds must be published as RFCs and appro).12 E
-.18(ve)-.18 G 3(du).18 G(sing the IETF)-3 E
(Consensus process [N8.RFC2434].)72 329 Q -2.58 -.3(Ke y)6 H -.12(wo).3
G(rds be).12 E(ginning with "x-" are reserv)-.18 E(ed for)-.18 E -.18
(ex)72 342 S(periments and use among consenting parties.).18 E
(Recipients of messages containing an)6 E
(Auto-Submitted \214eld with an)72 355 Q 3(yk)-.18 G -.18(ey)-3.12 G
-.12(wo).18 G(rd other than "no" MA).12 E 3(Ya)-1.26 G
(ssume that the message)-3 E -.12(wa)72 368 S 3(sn).12 G
(ot manually submitted by a human.)-3 E(Optional parameters may also be\
 de\214ned by an IETF Consensus process.)72 384.6 Q(The syntax of)6 E
(optional parameters is gi)72 397.6 Q -.18(ve)-.3 G 3(nh).18 G
(ere to allo)-3 E 3(wf)-.3 G(or future de\214nition should the)-3 E 3
(yb)-.18 G 3(en)-3 G(eeded.)-3 E(Implementations of Auto-Submitted conf\
orming to this speci\214cation MUST NO)72 410.6 Q 3(Tf)-.48 G(ail to)
-3.12 E(recognize an Auto-Submitted \214eld and k)72 423.6 Q -.18(ey)
-.12 G -.12(wo).18 G(rd that contains syntactically v).12 E
(alid optional)-.3 E(parameters, b)72 436.6 Q
(ut such implementations MA)-.24 E 3(Yi)-1.26 G
(gnore those parameters if the)-3 E 3(ya)-.18 G(re present.)-3 E -.18
(Pa)72 449.6 S(rameter names be).18 E(ginning with "x-" are reserv)-.18
E(ed for e)-.18 E(xperiments and use among)-.18 E(consenting parties.)72
462.6 Q(The "comment" syntactical construct from [N2.RFC2822] can be us\
ed to indicate a)72 479.2 Q(reason wh)72 492.2 Q 3(yt)-.06 G
(his message w)-3 E(as automatically submitted.)-.12 E/F2 12
/Times-Bold@0 SF(6. Security Considerations)72 518.2 Q F0
(Automatic responders introduce the potential for se)72 534.8 Q -.18(ve)
-.3 G(ral kinds of attack, including:).18 E F1<83>72 551.4 Q F0
(Use of such responders to relay harmful or ab)20.1 E(usi)-.24 E .36
-.18(ve c)-.3 H(ontent \(w).18 E(orms, viruses, spam,)-.12 E(and sp)97
564.4 Q(ymail\) for the purpose of wider distrib)-.12 E
(ution of the content or masking the)-.24 E(source of such content;)97
577.4 Q F1<83>72 594 Q F0(Use of such responders to mount denial-of-ser\
vice attacks by using responders to)20.1 E(relay messages to lar)97 607
Q(ge numbers of addresses, or to \215ood indi)-.216 E(vidual mailbox)-.3
E(es with)-.18 E 3(al)97 620 S(ar)-3 E(ge amount of unw)-.216 E
(anted content, or both;)-.12 E F1<83>72 636.6 Q F0(Deliberate or accid\
ental use of such responders to construct mail loops or "sorcerer')20.1
E(s)-.66 E(apprentice mode", thus taxing the resources of the mail tran\
sport system;)97 649.6 Q 110.346(Moore Automatic)72 697 R
(E-Mail Responses)3 E([P)99.198 E(age 12])-.18 E EP
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E/F1 14/Times-Roman@0 SF<83>72 85 Q F0
(Use of such responders to determine whether recipient addresses are v)
20.1 E(alid,)-.3 E
(especially when such information is not otherwise pro)97 98 Q
(vided \(e.g. SMTP RCPT or)-.18 E
(VRFY command responses\) and is not intended to be disclosed;)97 111 Q
F1<83>72 127.6 Q F0(Use of such responders to obtain personal informati\
on about recipients, including)20.1 E(information about recipients' rec\
ent usage of his mailbox or recent acti)97 140.6 Q(vity;)-.3 E F1<83>72
157.2 Q F0(In addition, the responder itself may be subject to attack b\
y sending it lar)20.1 E(ge numbers)-.216 E(of requests.)97 170.2 Q(This\
 document attempts to reduce the vulnerability of responders to such at\
tack, in)72 186.8 Q(particular by)72 199.8 Q F1<83>72 216.4 Q F0(Recomm\
ending that responders not relay signi\214cant content from the subject)
20.1 E(message \(thus minimizing the potential for use of responders to\
 launder or amplify)97 229.4 Q(attack)97 242.4 Q(er)-.12 E
(-chosen content\))-.24 E F1<83>72 259 Q F0
(Recommending that responders clearly mark responses with the)20.1 E 3
("Auto-Submitted: auto-replied")97 272 R
(header \214eld to distinguish them from messages)3 E(originated by hum\
ans \(in part, to minimize the potential for loops and denial-of-)97 285
Q(service attacks\),)97 298 Q F1<83>72 314.6 Q F0(Recommending that Per\
sonal and Group Responders limit the number of responses)20.1 E
(sent to an)97 327.6 Q 3(yi)-.18 G(ndi)-3 E
(vidual per period of time \(also limiting the potential damage caused)
-.3 E(by loops\),)97 340.6 Q F1<83>72 357.2 Q F0(Recommending that resp\
onders respond to at most one address per incoming)20.1 E(message \(to \
minimize the potential for deliberate or accidental denial-of-service v\
ia)97 370.2 Q("multiplication" or sorcerer')97 383.2 Q 3(sa)-.66 G
(pprentice mode\),)-3 E F1<83>72 399.8 Q F0(Recommending that responses\
 from Personal and Group Responders should be brief)20.1 E
(and in plain te)97 412.8 Q(xt format \(to minimize the potential for m\
ail responders to be used as)-.18 E(mechanisms for transmitting harmful\
 content and/or disguising the source of)97 425.8 Q(harmful content\).)
97 438.8 Q(Ho)72 455.4 Q(we)-.3 E -.18(ve)-.3 G .96 -.48(r, b).18 H
(ecause email addresses are easily for).48 E
(ged, attacks are still possible for an)-.216 E(y)-.18 E(email responde\
r which does not limit access and require authentication before issuing\
 a)72 468.4 Q 3(response. The)72 481.4 R(abo)3 E .36 -.18(ve m)-.18 H
(easures attempt to limit the damage which can be done, b).18 E(ut the)
-.24 E(y)-.18 E(cannot entirely pre)72 494.4 Q -.18(ve)-.3 G
(nt attacks.).18 E(This section describes vulnerabilities inherent in a\
utomatically responding to mail.)72 511 Q(Other)6 E(vulnerabilities are\
 associated with some mail-based services which automatically respond)72
524 Q(to email messages, b)72 537 Q(ut these are not caused by the f)
-.24 E(act that the serv)-.12 E(er automatically)-.18 E
(responds to incoming messages.)72 550 Q(In general, an)6 E 3(yn)-.18 G
(etw)-3 E(ork-based service \(including those)-.12 E
(accessed by email\) needs to pro)72 563 Q(vide security that is suf)
-.18 E(\214cient to pre)-.3 E -.18(ve)-.3 G(nt the service from).18 E
(being used as a means to inappropriately or destructi)72 576 Q -.18(ve)
-.3 G(ly access the resources that are).18 E(accessible by the service.)
72 589 Q(It has also been noted that Personal and Group Responders some\
times inappropriately)72 605.6 Q
(disclose recipients' personal information.)72 618.6 Q
(This might happen automatically \(as when a)6 E
(Group Responder automatically supplies a recipient')72 631.6 Q 3(sp)
-.66 G(ersonal or mobile telephone)-3 E
(number as alternate contact information\) or "manually".)72 644.6 Q
(Automatically-generated)6 E(information SHOULD NO)72 657.6 Q 3(Ti)-.48
G(nclude personal information about the recipient which is not)-3 E
110.346(Moore Automatic)72 697 R(E-Mail Responses)3 E([P)99.198 E
(age 13])-.18 E EP
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E(already kno)72 85 Q(wn to, or easily a)-.3 E -.3(va)-.24 G
(ilable to, the sender of the subject message.).3 E(User)6 E(interf)72
98 Q(aces which allo)-.12 E 3(wr)-.3 G(ecipients to supply response te)
-3 E(xt SHOULD mak)-.18 E 3(ei)-.12 G 3(tc)-3 G(lear to the)-3 E
(user that this information will be made a)72 111 Q -.3(va)-.24 G
(ilable not only to local colleagues b).3 E(ut also to)-.24 E
(the entire Internet, including potential attack)72 124 Q(ers.)-.12 E/F1
12/Times-Bold@0 SF(7. IAN)72 150 Q 3(AC)-.24 G(onsiderations)-3 E F0
(Section 5 of this document de\214nes tw)72 166.6 Q 3(on)-.12 G .6 -.3
(ew e)-3 H(xtension mechanisms - ne).12 E 3(wk)-.3 G -.18(ey)-3.12 G
-.12(wo).18 G(rds for).12 E(the Auto-Submitted header \214eld, and ne)72
179.6 Q 3(wo)-.3 G(ptional parameters for the Auto-Submitted)-3 E 3
(\214eld. If)72 192.6 R(at an)3 E 3(yp)-.18 G(oint in the future ne)-3 E
3(wk)-.3 G -.18(ey)-3.12 G -.12(wo).18 G(rds or parameters are appro).12
E -.18(ve)-.18 G 3(d\().18 G(through an)-3 E
(IETF Consensus process\) it may be appropriate for IAN)72 205.6 Q 3(At)
-.42 G 3(oc)-3 G(reate a re)-3 E(gistry of such)-.18 E -.12(ke)72 218.6
S(yw)-.06 E(ords or parameters.)-.12 E F1(8. Ackno)72 244.6 Q
(wledgments)-.12 E F0(In the mid-1990s Jeroen Houttuin of TEREN)72 261.2
Q 3(Aa)-.42 G(uthored a series of internet-drafts on)-3 E("Beha)72 274.2
Q(vior of Mail Based Serv)-.24 E(ers", and in particular)-.18 E 3(,o)
-.48 G(ne document on "Answering)-3 E(Serv)72 287.2 Q(ers" [I7.BOMBS].)
-.18 E(While these documents were \(to this author')6 E 3(sk)-.66 G(no)
-3 E(wledge\) ne)-.3 E -.18(ve)-.3 G(r).18 E(formally published, the)72
300.2 Q 3(yp)-.18 G(ro)-3 E(vided the \214rst well-reasoned ar)-.18 E
(gument \(kno)-.216 E(wn to this author\))-.3 E(as to the best w)72
313.2 Q(ay for such serv)-.12 E(ers to interf)-.18 E
(ace with email systems and protocols.)-.12 E(The idea for the Auto-Sub\
mitted \214eld comes from the X.400/MHS mail system)72 329.8 Q 3
([I8.X420]. [I9.RFC2156])72 342.8 R
(de\214ned an "Autosubmitted" \214eld for use when g)3 E(ate)-.06 E -.12
(wa)-.3 G(ying).12 E(between X.400 and Internet mail.)72 355.8 Q
(Jacob P)6 E(alme wrote an internet-draft [I10.A)-.18 E(UT)-.66 E(OSUB])
-.216 E(de\214ning use of the "Auto-Submitted" \214eld for Internet mai\
l, which made it through Last)72 368.8 Q
(Call without signi\214cant objections, b)72 381.8 Q
(ut got stalled in an attempt to resolv)-.24 E 3(en)-.18 G
(on-substantial)-3 E 3(objections. The)72 394.8 R
(de\214nition of Auto-Submitted in this document is deri)3 E -.18(ve)-.3
G 3(d\().18 G(i.e. slightly)-3 E
(simpli\214ed\) from the one in that document, with some te)72 407.8 Q
(xt stolen outright.)-.18 E(Thanks are also due to those who contrib)72
424.4 Q(uted suggestions to this document: Russ Allbery)-.24 E(,)-.78 E
(Adam Costello, Ned Freed, La)72 437.4 Q
(wrence Green\214eld, Arnt Gulbrandsen, Eric Hall, T)-.18 E(on)-.96 E(y)
-.18 E(Hansen, Dan K)72 450.4 Q(ohn, Bruce Lilly)-.42 E 3(,d)-.78 G
(er Mouse, L)-3 E(yndon Nerenber)-.66 E(g, Florian W)-.216 E(eimer)-.96
E 3(,a)-.48 G(nd Dan)-3 E -.48(Wi)72 463.4 S(ng.).48 E F1(9. A)72 489.4
Q(uthor')-.6 E 3(sA)-.444 G(ddr)-3 E(ess)-.216 E F0 -.3(Ke)72 508.4 S
(ith Moore).3 E(Inno)72 521.4 Q -.3(va)-.18 G(ti).3 E .36 -.18(ve C)-.3
H(omputing Laboratory).18 E(Uni)72 534.4 Q -.18(ve)-.3 G(rsity of T).18
E(ennessee, Knoxville)-.84 E(1122 V)72 547.4 Q(olunteer Blvd, #203)
-1.548 E(Knoxville, TN 37996-3450)72 560.4 Q/F2 12/Courier@0 SF
(moore@cs.utk.edu)72 586.4 Q F1(10. Normati)72 618.4 Q .24 -.12(ve R)
-.12 H(efer).12 E(ences)-.216 E F0([N1.RFC2119])72 635 Q(Bradner)114 648
Q 3(,S)-.48 G 3(.K)-3 G .36 -.18(ey w)-3.3 H
(ords for use in RFCs to Indicate Requirement Le).06 E -.18(ve)-.3 G 3
(ls. RFC).18 F 110.346(Moore Automatic)72 697 R(E-Mail Responses)3 E([P)
99.198 E(age 14])-.18 E EP
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/F0 12/Times-Roman@0 SF 287.712(Internet-Draft 1)72 49 R(October 2003)3
E(2119, March 1997.)114 85 Q([N2.RFC2822])72 101.6 Q(Resnick, P)114
114.6 Q 3(.\()-1.332 G(ed.\) Internet Message F)-3 E 3(ormat. RFC)-.18 F
(2822, April 2001.)3 E([N3.RFC2047])72 131.2 Q(Moore, K.)114 144.2 Q
(MIME \(Multipurpose Internet Mail Extensions\) P)6 E
(art Three: Message)-.18 E(Header Extensions for Non-ASCII T)114 157.2 Q
-.18(ex)-.84 G 3(t. RFC).18 F(2047, No)3 E -.18(ve)-.18 G(mber 1996.).18
E([N4.RFC2231])72 173.8 Q(Freed, N., Moore., K.)114 186.8 Q(MIME P)6 E
(arameter V)-.18 E(alue and Encoded W)-1.332 E(ord Extensions:)-.96 E
(Character Sets, Languages, and Continuations.)114 199.8 Q(RFC 2231, No)
6 E -.18(ve)-.18 G(mber 1997.).18 E([N5.RFC2003])72 216.4 Q(Moore, K.)
114 229.4 Q(SMTP Service Extension for Deli)6 E -.18(ve)-.3 G
(ry Status Noti\214cations.).18 E(RFC)6 E(3461, January 2003.)114 242.4
Q([N6.RFC2234])72 259 Q(Crock)114 272 Q(er)-.12 E 3(,D)-.48 G 3(.\()-3 G
(ed.\), Ov)-3 E(erell, P)-.18 E 3(.A)-1.332 G
(ugmented BNF for Syntax Speci\214cations: ABNF)-3 E(.)-.96 E
(RFC 2234, No)114 285 Q -.18(ve)-.18 G(mber 1997.).18 E([N7.RFC2045])72
301.6 Q(Freed, N. Borenstein, N.)114 314.6 Q
(Multipurpose Internet Mail Extensions \(MIME\) P)6 E(art)-.18 E(One: F)
114 327.6 Q(ormat of Internet Message Bodies.)-.18 E(RFC 2045, No)6 E
-.18(ve)-.18 G(mber 1996.).18 E([N8.RFC2434])72 344.2 Q(Narten, T)114
357.2 Q(., Alv)-.888 E(estrand, H.)-.18 E(Guidelines for Writing an IAN)
6 E 3(AC)-.42 G(onsiderations)-3 E(Section in RFCs.)114 370.2 Q
(RFC 2434, October 1998.)6 E/F1 12/Times-Bold@0 SF(11. Inf)72 396.2 Q
(ormati)-.3 E .24 -.12(ve R)-.12 H(efer).12 E(ences)-.216 E F0([I1.J)72
412.8 Q(ARGON])-.72 E("Sorcerer')114 425.8 Q 3(sa)-.66 G
(pprentice mode", originally from the Jar)-3 E
(gon \214le once maintained at)-.216 E(MIT)114 438.8 Q(-AI and SAIL; no)
-1.104 E 3(wc)-.3 G(ollected at v)-3 E(arious places on the net.)-.3 E
(See e.g.)6 E/F2 12/Courier@0 SF(http://www.jargon.net/)114 451.8 Q F0
([I2.RFC3464])72 468.4 Q(Moore, K. V)114 481.4 Q(audreuil, G.)-1.332 E
(An Extensible Message F)6 E(ormat for Deli)-.18 E -.18(ve)-.3 G
(ry Status).18 E 3(Noti\214cations. RFC)114 494.4 R(3464, January 2003.)
3 E([I3.RFC2298])72 511 Q -.18(Fa)114 524 S(jman, R.).18 E
(An Extensible Message F)6 E(ormat for Message Disposition)-.18 E
(Noti\214cations. RFC 2298, March 1998.)114 537 Q([I4.RFC2076])72 553.6
Q -.18(Pa)114 566.6 S(lme, J.).18 E(Common Internet Message Headers.)6 E
(RFC 2076, February 1997.)6 E([I5.RFC2369])72 583.2 Q(Neufeld, G., Baer)
114 596.2 Q 3(,J)-.48 G 3(.T)-3 G
(he Use of URLs as Meta-Syntax for Core Mail List)-3 E
(Commands and their T)114 609.2 Q
(ransport through Message Header Fields.)-.42 E(RFC 2369, July)6 E
(1998.)114 622.2 Q([I6.RFC822])72 638.8 Q(Crock)114 651.8 Q(er)-.12 E 3
(,D)-.48 G 6(.S)-3 G(tandard for the format of ARP)-6 E 3(AI)-1.104 G
(nternet te)-3 E(xt messages.)-.18 E(RFC 822,)6 E 110.346
(Moore Automatic)72 697 R(E-Mail Responses)3 E([P)99.198 E(age 15])-.18
E EP
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/F0 12/Times-Roman@0 SF 287.712(Internet-Draft 1)72 49 R(October 2003)3
E(August 1982.)114 85 Q([I7.BOMBS])72 101.6 Q
(Houttuin, J. BoMBS series: Beha)114 114.6 Q(vior of Mail Based Serv)
-.24 E(ers / P)-.18 E(art 2: A-BoMBS)-.18 E 3(/A)114 127.6 S
(nswering Serv)-3 E 3(ers. Expired)-.18 F
(Internet-Draft "draft-rare-msg-a-bombs-01.txt",)3 E
(December 1994. \(reference included only for attrib)114 140.6 Q
(ution\))-.24 E([I8.X420])72 157.2 Q(CCITT Recommendation X.420 \(1992 \
E\). Information technology - Message)114 170.2 Q
(Handling Systems \(MHS\): Interpersonal messaging system, 1992.)114
183.2 Q([I9.RFC2156])72 199.8 Q(Kille, S.)114 212.8 Q
(MIXER \(Mime Internet X.400 Enhanced Relay\): Mapping between)6 E
(X.400 and RFC 822/MIME.)114 225.8 Q(RFC 2156, January 1998.)6 E([I10.A)
72 242.4 Q(UT)-.66 E(OSUB])-.216 E -.18(Pa)114 255.4 S(lme, J.).18 E
("The Auto-Submitted and Expires Headers in E-mail".)6 E(Expired)6 E
(Internet-Draft "draft-ietf-maile)114 268.4 Q(xt-ne)-.18 E
(w-\214elds-15.txt", February 1999. \(reference)-.3 E
(included only for attrib)114 281.4 Q(ution\))-.24 E/F1 12/Times-Bold@0
SF(12. Copyright Notice)72 307.4 Q F0(Cop)72 324 Q
(yright \(C\) The Internet Society \(2003\). All Rights Reserv)-.12 E
(ed.)-.18 E(This document and translations of it may be copied and furn\
ished to others, and)72 340.6 Q(deri)72 353.6 Q -.3(va)-.3 G(ti).3 E .36
-.18(ve w)-.3 H(orks that comment on or otherwise e).06 E
(xplain it or assist in its implementation)-.18 E
(may be prepared, copied, published and distrib)72 366.6 Q
(uted, in whole or in part, without)-.24 E(restriction of an)72 379.6 Q
3(yk)-.18 G(ind, pro)-3 E(vided that the abo)-.18 E .36 -.18(ve c)-.18 H
(op).18 E(yright notice and this paragraph are)-.12 E
(included on all such copies and deri)72 392.6 Q -.3(va)-.3 G(ti).3 E
.36 -.18(ve w)-.3 H 3(orks. Ho).06 F(we)-.3 E -.18(ve)-.3 G .96 -.48
(r, t).18 H(his document itself may not).48 E(be modi\214ed in an)72
405.6 Q 3(yw)-.18 G(ay)-3.12 E 3(,s)-.78 G(uch as by remo)-3 E
(ving the cop)-.18 E(yright notice or references to the)-.12 E
(Internet Society or other Internet or)72 418.6 Q -.06(ga)-.216 G
(nizations, e).06 E(xcept as needed for the purpose of)-.18 E(de)72
431.6 Q -.18(ve)-.3 G
(loping Internet standards in which case the procedures for cop).18 E
(yrights de\214ned in the)-.12 E
(Internet Standards process must be follo)72 444.6 Q
(wed, or as required to translate it into languages)-.3 E
(other than English.)72 457.6 Q(The limited permissions granted abo)72
474.2 Q .36 -.18(ve a)-.18 H(re perpetual and will not be re).18 E -.24
(vo)-.3 G -.12(ke).24 G 3(db).12 G 3(yt)-3 G(he)-3 E
(Internet Society or its successors or assigns.)72 487.2 Q
(This document and the information contained herein is pro)72 503.8 Q
(vided on an "AS IS" basis and)-.18 E
(THE INTERNET SOCIETY AND THE INTERNET ENGINEERING T)72 516.8 Q
(ASK FORCE)-1.116 E(DISCLAIMS ALL W)72 529.8 Q
(ARRANTIES, EXPRESS OR IMPLIED, INCLUDING B)-1.44 E(UT NO)-.12 E(T)-.48
E(LIMITED T)72 542.8 Q 3(OA)-.216 G(NY W)-3 E(ARRANTY THA)-1.44 E 3(TT)
-1.332 G(HE USE OF THE INFORMA)-3 E(TION HEREIN)-1.332 E(WILL NO)72
555.8 Q 3(TI)-.48 G(NFRINGE ANY RIGHTS OR ANY IMPLIED W)-3 E
(ARRANTIES OF)-1.44 E(MERCHANT)72 568.8 Q(ABILITY OR FITNESS FOR A P)
-1.116 E(AR)-1.104 E(TICULAR PURPOSE.)-.72 E F1(13. Changes since v)72
594.8 Q(ersion -03 \(not intended f)-.12 E(or inclusion in the RFC\))-.3
E F0 21.004(-f)72 611.4 S(ormat of references changed.)-21.004 E
(see note to RFC Editor belo)6 E(w)-.3 E 21.004(-s)72 628 S
(tatus paragraph follo)-21.004 E(wing abstract mark)-.3 E
(ed as not being intended for publication as)-.12 E(an RFC)97 641 Q
110.346(Moore Automatic)72 697 R(E-Mail Responses)3 E([P)99.198 E
(age 16])-.18 E EP
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/F0 12/Times-Roman@0 SF 287.712(Internet-Draft 1)72 49 R(October 2003)3
E 21.004(-s)72 85 S(ection 1.1 - personal group responders no)-21.004 E
3(wo)-.3 G(perate "in addition to, or in lieu of" a)-3 E
(recipient response. \(w)97 98 Q(as "in adv)-.12 E
(ance of, or in lieu of"\))-.3 E 21.004(-s)72 114.6 S(ection 2 - it')
-21.004 E 3(sn)-.66 G .6 -.3(ow o)-3 H
(kay to send personal or group responses to a recipient named in).3 E 3
(ar)97 127.6 S(esent-{to,cc,bcc} \214eld.)-3 E 21.004(-s)72 144.2 S
(ection 2 - responder no)-21.004 E 3(wM)-.3 G(UST NO)-3 E 3(Ts)-.48 G
(end a response to a null address \(w)-3 E(as)-.12 E(SHOULD NO)97 157.2
Q(T\))-.48 E 21.004(-s)72 173.8 S(ection 5.1 - missing de\214nitions of\
 CFWS and CRLF productions referenced from)-21.004 E(RFC 2822.)97 186.8
Q 21.004(-c)72 203.4 S(op)-21.004 E(yright notice added, e)-.12 E -.18
(ve)-.3 G 3(nt).18 G
(hough author thinks the \214rst sentence after "status of)-3 E
(this memo" should be suf)97 216.4 Q(\214cient for an I-D.)-.3 E 21.004
(-r)72 233 S(eference to X.420 supplied \(thanks Ned\))-21.004 E/F1 12
/Times-Bold@0 SF(14. Notes to RFC Editor \(not intended f)72 259 Q
(or inclusion in the RFC\))-.3 E F0 21.004(-T)72 275.6 S(he format used\
 for references in this document is a compromise between the desire)
-21.004 E(to \(a\) ha)97 288.6 Q .36 -.18(ve i)-.24 H(nformati).18 E .36
-.18(ve a)-.3 H(nd normati).18 E .36 -.18(ve r)-.3 H
(eferences in separate sections \(b\) ha).18 E -.18(ve)-.24 G
(reference tags be meaningful to those who kno)97 301.6 Q 3(wt)-.3 G
(he documents \(e.g. RFC822\), and)-3 E(\(c\) ha)97 314.6 Q .36 -.18
(ve r)-.24 H(eferences appear in the order the).18 E 3(yw)-.18 G
(ere referenced.)-3 E(Unfortunately)6 E 3(,t)-.78 G(he)-3 E
(result is ugly)97 327.6 Q 6(.F)-.78 G
(eel free to change the format of reference tags as you see \214t.)-6 E
21.004(-I)72 344.2 S 3(fy)-21.004 G(ou see the te)-3 E
(xt ">From" appearing at the be)-.18 E
(ginning of a line in the document;)-.18 E
(this is due to a glitch in somebody')97 357.2 Q 3(sm)-.66 G
(ail system.)-3 E(Please change it to "From".)6 E(Thanks.)97 370.2 Q
21.004(-T)72 386.8 S(he internet-draft of this document has been produc\
ed in PostScript and PDF)-21.004 E -.18(ve)97 399.8 S
(rsions in addition to the plain te).18 E(xt v)-.18 E 3(ersion. This)
-.18 F -.12(wa)3 G 3(sd).12 G(one as an e)-3 E 3(xperiment. The)-.18 F
(author does not claim that these v)97 412.8 Q(ersions of)-.18 E(fer an)
-.3 E 3(yi)-.18 G(mpro)-3 E -.18(ve)-.18 G(ment in readability o).18 E
-.18(ve)-.18 G(r).18 E(the plain te)97 425.8 Q(xt v)-.18 E 3(ersion. In)
-.18 F -.12(fa)3 G(ct the author belie).12 E -.18(ve)-.3 G 3(st).18 G
(hat \(due to the formatting)-3 E(con)97 438.8 Q -.18(ve)-.48 G
(ntions used, paper size, etc\) the te).18 E(xt v)-.18 E
(ersion is more readable than the)-.18 E(alternati)97 451.8 Q -.18(ve)
-.3 G(s.).18 E 110.346(Moore Automatic)72 697 R(E-Mail Responses)3 E([P)
99.198 E(age 17])-.18 E EP
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