One document matched: draft-moore-auto-email-response-00.ps

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/F0 12/Times-Roman@0 SF 315.708(Internet-Draft K.)72 85 R(Moore)3 E
(Expires: 5 December 2002)72 98 Q(Uni)188.376 E -.18(ve)-.3 G
(rsity of T).18 E(ennessee)-.84 E 3(5J)446.004 111 S(une 2002)-3 E
(Recommendations for Automatic Responses to Electronic Mail)136.014 150
Q(draft-moore-auto-email-response-00)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
(http://www)72 359.4 Q(.ietf.or)-.78 E(g/1id-abstracts.html)-.216 E
(The list of Internet-Draft Shado)72 376 Q 3(wD)-.3 G
(irectories can be accessed at)-3 E(http://www)72 389 Q(.ietf.or)-.78 E
(g/shado)-.216 E -.78(w.)-.3 G(html).78 E
(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 <ietf-822@imc.or)72
418.6 Q(g>, or to the author)-.216 E(.)-.66 E(Such comments should cite\
 the Internet-Draft identi\214er draft-moore-auto-email-)72 431.6 Q
(response-00 so others can be sure you are commenting on the same v)72
444.6 Q(ersion the)-.18 E 3(yr)-.18 G(ead.)-3 E F1(Abstract)72 470.6 Q
F0(This memo mak)72 487.2 Q(es recommendations for softw)-.12 E
(are that automatically responds to)-.12 E
(incoming electronic mail messages, including "out of the of)72 500.2 Q
(\214ce" response generators,)-.3 E(mail \214ltering softw)72 513.2 Q
(are, email-based information services, and other automatic responders.)
-.12 E
(The purpose of these recommendations is to discourage undesirable beha)
72 526.2 Q(vior which is)-.24 E(caused or aggra)72 539.2 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)72 552.2 Q
(among implementors of automatic email responders.)72 565.2 Q F1
(1. Intr)72 591.2 Q(oduction)-.216 E F0(Man)72 607.8 Q 3(yp)-.18 G
(rograms which automatically respond to email are currently in use.)-3 E
(Although)6 E(these programs v)72 620.8 Q
(ary widely in their function, se)-.3 E -.18(ve)-.3 G
(ral problems with this class of).18 E(programs ha)72 633.8 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)72 646.8 Q(loops or "sorcerer')72 659.8 Q 3
(sa)-.66 G(pprentice" syndrome.)-3 E(This memo recommends beha)6 E
(vior for)-.24 E 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 304.368(Internet-Draft 5)72 49 R(June 2002)3 E(\
programs that automatically respond to electronic mail in order to redu\
ce the number of)72 85 Q(problems caused by such programs.)72 98 Q/F1 12
/Times-Bold@0 SF(1.1 T)72 124 Q(ypes of automatic r)-.888 E(esponses)
-.216 E F0(There are se)72 140.6 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)72 153.6 Q .36 -.18(ve b)-.24 H
(een de\214ned in IETF standards - Deli).18 E -.18(ve)-.3 G
(ry Status Noti\214cations [1] which).18 E
(are intended to report the status of a message deli)72 166.6 Q -.18(ve)
-.3 G(ry by the message transport system,).18 E(and Message Disposition\
 Noti\214cations [2] which are intended to report of the disposition)72
179.6 Q(of a message after it reaches a recipient')72 192.6 Q 3(sm)-.66
G 3(ailbox. These)-3 F(responses are de\214ned)3 E(else)72 205.6 Q
(where and are generally not within the purvie)-.3 E 3(wo)-.3 G 3(ft)-3
G(his document, e)-3 E(xcept that this)-.18 E
(document recommends speci\214c cases where the)72 218.6 Q 3(ys)-.18 G
(hould or should not be used.)-3 E
(Other types of automatic response in common use include:)72 235.2 Q/F2
14/Times-Roman@0 SF<83>72 251.8 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)97 264.8 Q
(ely to be read, or acted on, for some amount of)-.12 E(time;)97 277.8 Q
F2<83>72 294.4 Q F0(Email-based information services, which accept requ\
ests \(presumably from humans\))20.1 E(via email, pro)97 307.4 Q
(vide some service, and issue responses via email also.)-.18 E
(\(Mailing lists)6 E(which accept subscription requests via email f)97
320.4 Q(all into this cate)-.12 E(gory\);)-.18 E F2<83>72 337 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;)97 350 Q F2<83>72 366.6 Q F0
-1.332(Va)20.1 G(rious kinds of mail \214lters \(including "virus scann\
ers"\) which act on behalf of a)1.332 E
(recipient to alter the content of messages before forw)97 379.6 Q
(arding them to that recipient,)-.12 E(and issue responses in the e)97
392.6 Q -.18(ve)-.3 G(nt a message is altered; and).18 E F2<83>72 409.2
Q F0(Responders designed to \214lter unsolicited messages from programs\
 \(e.g. a program)20.1 E(that responds to an)97 422.2 Q 3(ym)-.18 G
(essage from an unkno)-3 E(wn or un)-.3 E -.18(ve)-.48 G
(ri\214able source and requires).18 E(that party to "demonstrate signs \
of intelligent life" before the original message can)97 435.2 Q
(be read.\))97 448.2 Q(Recognizing the wide v)72 464.8 Q
(ariety of response types in use, these recommendations)-.3 E
(distinguish between se)72 477.8 Q -.18(ve)-.3 G
(ral classes of automatic responders according to the party or).18 E
(service on whose behalf the responder acts:)72 490.8 Q F2<83>72 507.4 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)97 520.4 R
(are permanently associated with an email address, and when)3 E
(sending to such an address the sender presumably e)97 533.4 Q
(xpects an automatic response.)-.18 E(An email-based \214le retrie)97
546.4 Q -.3(va)-.3 G 3(ls).3 G(ervice is an e)-3 E
(xample of a Service Responder)-.18 E(.)-.66 E F2<83>72 563 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(human recipient, in adv)
97 576 Q(ance of, or in lieu of, that recipient reading the message.)-.3
E
(These responders operate according to criteria speci\214ed by the indi)
97 589 Q(vidual recipient.)-.3 E(The UNIX "v)97 602 Q
(acation" program is an e)-.3 E(xample of a Personal Responder)-.18 E(.)
-.66 E F2<83>72 618.6 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(fag)
-3 G(roup)-3 E(of human recipients, in adv)97 631.6 Q
(ance of, or in lieu of, a response from the actual)-.3 E 3
(recipient. Group)97 644.6 R
(Responders are similar to Personal Responders e)3 E(xcept that in the)
-.18 E(case of a Group Responder the criteria for responding are not se\
t by the indi)97 657.6 Q(vidual)-.3 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 304.368(Internet-Draft 5)72 49 R(June 2002)3 E 3
(recipient. A)97 85 R
("virus scanner" program that \214ltered all mail sent to a group of)3 E
(recipients \(say)97 98 Q 3(,e)-.78 G -.18(ve)-3.3 G
(ry recipient in a particular DNS domain\) and sent responses when).18 E
3(am)97 111 S(essage w)-3 E(as rejected or deli)-.12 E -.18(ve)-.3 G
(red in an altered form, w).18 E(ould be an e)-.12 E(xample of a)-.18 E
(Group Responder)97 124 Q(.)-.66 E(Appropriate beha)72 140.6 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 \(where the sender is e)
72 153.6 Q(xpecting an)-.18 E(automatic response\) might not be appropr\
iate from a Personal Responder)72 166.6 Q 6(.F)-.66 G(or e)-6.18 E
(xample, a)-.18 E(Service Responder might send a v)72 179.6 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.)72 192.6
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)72 205.6 Q(responses in plain te)72 218.6 Q(xt.)-.18 E/F1 12
/Times-Bold@0 SF(1.2. Notation)72 244.6 Q F0(The k)72 261.2 Q .36 -.18
(ey w)-.12 H(ords "MUST", "MUST NO).06 E(T", "REQ)-.48 E
(UIRED", "SHALL", "SHALL NO)-.12 E(T",)-.48 E("SHOULD", "SHOULD NO)72
274.2 Q(T", "RECOMMENDED",)-.48 E("MA)6 E(Y", and "OPTION)-1.26 E
(AL" in)-.42 E(this document are to be interpreted as described in [3].)
72 287.2 Q F1(2. F)72 313.2 Q(ormat of automatic r)-.3 E(esponses)-.216
E F0(The follo)72 329.8 Q(wing sections specify details of the contents\
 of automatic responses, including)-.3 E(the header of the response mes\
sage, the content of the response, and the en)72 342.8 Q -.18(ve)-.48 G
(lope in).18 E
(which the response is transmitted to the email transport system.)72
355.8 Q F1(2.1 Message header)72 381.8 Q F0
(The \214elds in the message header SHOULD be set as follo)72 398.4 Q
(ws:)-.3 E F1(2.1.1 Fr)72 424.4 Q(om \214eld)-.216 E F0
(In correspondence between humans, the From \214eld serv)72 441 Q
(es multiple purposes: It identi\214es)-.18 E(the author of the message\
 \(or in some cases, the party or parties on whose behalf the)72 454 Q
(message w)72 467 Q(as sent\), and it is the def)-.12 E
(ault destination of replies from humans.)-.12 E(Also,)6 E
(unfortunately some mail systems still send nondeli)72 480 Q -.18(ve)-.3
G(ry reports and other kinds of).18 E
(automatic responses to the From address.)72 493 Q -.18(Fo)72 509.6 S 3
(ra).18 G(utomatic responses, the role of the From \214eld in determini\
ng the destination of)-3 E(replies from humans is less signi\214cant, b\
ecause in most cases it is not useful or)72 522.6 Q
(appropriate for a human \(or an)72 535.6 Q
(yone\) to reply to an automatic response. \(The e)-.18 E(xception is)
-.18 E(when there is some problem with the response; it should be possi\
ble to pro)72 548.6 Q(vide feedback)-.18 E
(to the person operating the responder\).)72 561.6 Q(So the From addres\
s in an automatic response needs to be chosen according to the)72 578.2
Q(follo)72 591.2 Q(wing criteria:)-.3 E/F2 14/Times-Roman@0 SF<83>72
607.8 Q F0 1.92 -.96(To p)20.1 H(ro).96 E(vide an indication of the par\
ty or agent on whose behalf the response w)-.18 E(as)-.12 E(sent,)97
620.8 Q F2<83>72 637.4 Q F0 1.92 -.96(To p)20.1 H(ro).96 E(vide an addr\
ess to which a recipient of an inappropriate response can request)-.18 E
(that the situation be corrected, and)97 650.4 Q 110.346
(Moore Automatic)72 697 R(E-Mail Responses)3 E([P)105.198 E(age 3])-.18
E EP
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/F1 14/Times-Roman@0 SF<83>72 85 Q F0 1.92 -.96(To d)20.1 H
(iminish the potential for mail loops.).96 E(The follo)72 101.6 Q
(wing beha)-.3 E(vior is thus recommended:)-.24 E F1<83>72 118.2 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, and the)97 131.2 Q(human-readable\
 portion of the From \214eld \(the phrase preceding the address\))97
144.2 Q(SHOULD contain a name or description of the service to identify\
 the service to)97 157.2 Q(humans.)97 170.2 Q F1<83>72 186.8 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)97 199.8 Q
(correspondents. Normally this w)97 212.8 Q
(ould be the same address that w)-.12 E(as used to send mail)-.12 E
(to that recipient.)97 225.8 Q(In the case of a recipient ha)97 242.4 Q
(ving multiple mail addresses forw)-.24 E(arded to the same)-.12 E
(mailbox \(and responder\), a Personal Responder MA)97 255.4 Q 3(Yu)
-1.26 G(se heuristics to guess, based)-3 E(on the information a)97 268.4
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)97 281.4 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.)97 294.4 Q(Ho)6 E(we)-.3 E -.18(ve)
-.3 G 3(ra).18 G .36 -.18(ny a)-3 H(ddress chosen by this method MUST)
.18 E(ha)97 307.4 Q .36 -.18(ve b)-.24 H(een e).18 E(xplicitly allo)-.18
E(wed by the recipient on whose behalf the responder is)-.3 E
(operating.)97 320.4 Q(Note: Due to pri)97 337 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)97 350 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 dis\
closes the)97 363 Q
(speci\214c name of the computer where the response w)97 376 Q
(as generated.)-.12 E(Furthermore)6 E
(these do not necessarily produce a v)97 389 Q
(alid public email address for the recipient.)-.3 E -.18(Fo)6 G(r).18 E
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 by the)97 402 Q(recipient on whose behalf the responder is acting.)97
415 Q F1<83>72 431.6 Q F0 -.18(Fo)20.1 G 3(rG).18 G(roup Responders, th\
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(could be used to reach the maintainer of that Group Responder)97 444.6
Q 6(.U)-.66 G(se of the)-6 E(Postmaster address for this purpose is NO)
97 457.6 Q 3(TR)-.48 G(ECOMMENDED.)-3 E(The human-readable portion of t\
he From address \(the phrase before the address\))97 474.2 Q(SHOULD con\
tain an indication of the function performed by the Group Responder)97
487.2 Q(and on whose behalf it operates \(e.g. "Example Agenc)97 500.2 Q
3(yv)-.18 G(irus \214lter"\))-3 E/F2 12/Times-Bold@0 SF(2.1.2 T)72 526.2
Q 3<6f8c>-1.104 G(eld)-3 E F0(The T)72 542.8 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)72 555.8 Q 3
(ya)-.18 G(utomatic response.)-3 E(This minimizes the potential)6 E
(for sorcerer')72 568.8 Q 3(sa)-.66 G
(pprentice syndrome and denial-of-service attacks.)-3 E F2
(2.1.3 Date \214eld)72 594.8 Q F0(The Date header \214eld SHOULD indica\
te the date and time at which the response w)72 611.4 Q(as)-.12 E 6
(composed. This)72 624.4 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)72 637.4 Q
(as sent.)-.12 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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/F0 12/Times-Roman@0 SF 304.368(Internet-Draft 5)72 49 R(June 2002)3 E
/F1 12/Times-Bold@0 SF(2.1.4 Subject \214eld)72 85 Q F0(The Subject \
\214eld SHOULD contain a brief indication that the message is an automa\
tic)72 101.6 Q(response, follo)72 114.6 Q(wed by contents of the Subjec\
t \214eld \(or a portion thereof\) of the subject)-.3 E 3(message. The)
72 127.6 R(pre\214x "Auto-Re:" MA)3 E 3(Yb)-1.26 G 3(eu)-3 G
(sed as such an indication.)-3 E(NO)72 144.2 Q
(TE: Just as the pre\214x "Re:" \(presumably an abbre)-.48 E
(viation of the English w)-.3 E(ord "reply"\))-.12 E(is sometimes trans\
lated to other languages by mail readers, or otherwise interpreted by)72
157.2 Q(mail readers as indication that the message is a reply)72 170.2
Q 3(,s)-.78 G 3(ot)-3 G(he pre\214x "Auto-Re:" may also)-3 E(be transla\
ted or used as a generic indication that the message is an automatic re\
sponse.)72 183.2 Q(Ho)72 196.2 Q(we)-.3 E -.18(ve)-.3 G 3(rt).18 G(he "\
Auto-Re:" indication is intended only as an aid to humans in processing\
 the)-3 E 3(message. The)72 209.2 R -.3(va)3 G
(lidity of "Auto-Re:" SHOULD NO).3 E 3(Tb)-.48 G 3(ea)-3 G
(ssumed by mail processing)-3 E(softw)72 222.2 Q(are.)-.12 E F1
(2.1.5 In-Reply-T)72 248.2 Q 3<6f8c>-1.104 G(eld)-3 E F0(The In-Reply-T)
72 264.8 Q 3<6f8c>-.96 G
(eld SHOULD be included in the header of the response message if)-3 E
(there w)72 277.8 Q(as a Message-ID \214eld in the subject message.)-.12
E(If present in the response, the)6 E(In-Reply-T)72 290.8 Q 3<6f8c>-.96
G(eld SHOULD contain the message-id of the subject message.)-3 E(A)9 E
(References \214eld MA)72 303.8 Q 3(Ya)-1.26 G(lso be supplied.)-3 E F1
(2.1.6 A)72 329.8 Q(uto-Submitted \214eld)-.6 E F0
(The Auto-Submitted \214eld, with a v)72 346.4 Q
(alue of "auto-replied", SHOULD be included in the)-.3 E
(message header of an)72 359.4 Q 3(ya)-.18 G(utomatic response.)-3 E
(See section 5.)6 E F1(2.2 Message content)72 385.4 Q F0(In general, me\
ssages sent by Personal or Group Responders SHOULD be brief, and in)72
402 Q(te)72 415 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 if it is desir\
able to use multiple charsets.)72 428 Q(Response messages SHOULD NO)72
444.6 Q 3(Ti)-.48 G
(nclude signi\214cant content from the subject message.)-3 E
(In particular responses SHOULD NO)72 457.6 Q 3(Tc)-.48 G(ontain non-te)
-3 E(xt/plain attachments from the)-.18 E(subject message.)72 470.6 Q F1
(2.2.1 Use of DSNs and MDNs f)72 496.6 Q(or automatic r)-.3 E(esponses)
-.216 E F0(An e)72 513.2 Q(xception to the abo)-.18 E .36 -.18(ve p)-.18
H(olic).18 E 3(yc)-.18 G
(an be made for responders whose purpose is to \214lter)-3 E
(out harmful content from incoming email.)72 526.2 Q
(In such cases it may be appropriate to issue a)6 E(deli)72 539.2 Q -.18
(ve)-.3 G(ry status noti\214cation \(DSN\) or a message disposition not\
i\214cation \(MDN\) to).18 E
(indicate that such mail has been refused, deleted, or altered.)72 552.2
Q(Such a responder MA)6 E 3(Yi)-1.26 G(ssue)-3 E 3(aD)72 565.2 S(SN if \
the responder is operating as a part of the mail transport system and h\
as access)-3 E(to the message en)72 578.2 Q -.18(ve)-.48 G
(lope, and the response is generated on or prior to deli).18 E -.18(ve)
-.3 G(ry to the).18 E(recipient')72 591.2 Q 3(sm)-.66 G 3
(ailbox. Alternati)-3 F -.18(ve)-.3 G(ly).18 E 3(,ar)-.78 G(esponse MA)
-3 E 3(Yu)-1.26 G(se the MDN format, pro)-3 E(vided the)-.18 E
(response is generated on or after deli)72 604.2 Q -.18(ve)-.3 G
(ry to a recipient').18 E 3(sm)-.66 G 3(ailbox. An)-3 F(MDN SHOULD)3 E
(NO)72 617.2 Q 3(Tb)-.48 G 3(ei)-3 G
(ssued as an automatic response unless the subject message contains a)-3
E(Disposition-Noti\214cation-T)72 630.2 Q 3<6f8c>-.96 G 3(eld. In)-3 F
(all cases such responses MUST conform to the DSN)3 E
(or MDN speci\214cations.)72 643.2 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 304.368(Internet-Draft 5)72 49 R(June 2002)3 E
-.18(Fo)72 85 S 3(re).18 G(xample, in the case of a DSN, the Action per)
-3.18 E(-recipient \214eld SHOULD be set to)-.24 E("f)72 98 Q
(ailed" with a Status code of 5.7.1 \(Deli)-.12 E -.18(ve)-.3 G
(ry not authorized, message refused\) if the).18 E(message w)72 111 Q
(as not deli)-.12 E -.18(ve)-.3 G
(red due to security reasons, and the Action \214eld SHOULD be set).18 E
(to "relayed" or "deli)72 124 Q -.18(ve)-.3 G
(red" \(as appropriate\) with a Status code of 2.6.4 \(con).18 E -.18
(ve)-.48 G(rsion with).18 E(loss performed\) if the message w)72 137 Q
(as modi\214ed to remo)-.12 E .36 -.18(ve s)-.18 H
(igni\214cant \(presumably harmful\)).18 E(content before relay or deli)
72 150 Q -.18(ve)-.3 G(ry b).18 E(ut the remainder of the message w)-.24
E(as relayed or)-.12 E(deli)72 163 Q -.18(ve)-.3 G
(red to its destination.).18 E
(In the case of an MDN, a disposition mode of "automatic-action/-)72
179.6 Q(MDN-sent-automatically" w)72 192.6 Q
(ould be appropriate, with a disposition-type of "deleted" or)-.12 E("d\
enied" with a disposition modi\214er of "error" for messages which were\
 automatically)72 205.6 Q(discarded, and a disposition-type of "process\
ed" with a disposition modi\214er of "w)72 218.6 Q(arning")-.12 E(for m\
essages which were \214ltered before being presented to the recipient.)
72 231.6 Q(The F)6 E(ailure: or)-.18 E -.96(Wa)72 244.6 S(rning: MDN \
\214elds could be used to supply additional information about the reaso\
n for).96 E(refusal or alteration of the message.)72 257.6 Q/F1 12
/Times-Bold@0 SF(2.3 Message en)72 283.6 Q -.12(ve)-.48 G(lope).12 E F0
(The SMTP MAIL FR)72 300.2 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)72 313.2 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)72 326.2 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')72 339.2 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')72 352.2 Q
3(sr)-.66 G(esponder)-3 E(.)-.66 E(The primary purpose of the MAIL FR)72
368.8 Q(OM address is to serv)-.48 E 3(ea)-.18 G 3(st)-3 G
(he destination for)-3 E(deli)72 381.8 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)72 394.8 Q(deli)72
407.8 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)72 420.8 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
433.8 Q 3(ym)-.18 G(essage sent to it,)-3 E(MA)72 446.8 Q 3(Yb)-1.26 G 3
(eu)-3 G(sed instead of <>.)-3 E(The RCPT T)72 463.4 Q 3(Oa)-.216 G(ddr\
ess should be the address of the intended recipient of the response.)-3
E(It)6 E(is RECOMMENDED that the NO)72 476.4 Q
(TIFY=NEVER parameter of the RCPT command be)-.48 E
(speci\214ed if the SMTP serv)72 489.4 Q
(er supports the DSN option [4].)-.18 E F1(3. When to send automatic r)
72 515.4 Q(esponses)-.216 E F0(An automatic responder MUST NO)72 532 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)72 545 Q -.12(wa)
-.12 G(ys reasons to refuse to respond to requests.).12 E
(The criteria for)6 E(deciding whether to respond will dif)72 558 Q
(fer from one responder to another)-.3 E 3(,a)-.48 G(ccording to the)-3
E(responder')72 571 Q 3(sp)-.66 G 3(urpose. In)-3 F
(general, care should be tak)3 E(en to a)-.12 E -.24(vo)-.24 G
(id sending useless or).24 E(redundant responses, and to a)72 584 Q -.24
(vo)-.24 G(id contrib).24 E(uting to mail loops and f)-.24 E
(acilitating denial-of-)-.12 E(service attacks.)72 597 Q
(Here are some broad guidelines:)72 613.6 Q/F2 14/Times-Roman@0 SF<83>72
630.2 Q F0(Automatic responses SHOULD NO)20.1 E 3(Tb)-.48 G 3(ei)-3 G
(ssued in response to an)-3 E 3(ym)-.18 G(essage which)-3 E
(contains an Auto-Submitted header \214eld with a v)97 643.2 Q
(alue of "auto-replied" or "auto-)-.3 E(generated".)97 656.2 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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/F0 12/Times-Roman@0 SF 304.368(Internet-Draft 5)72 49 R(June 2002)3 E
/F1 14/Times-Roman@0 SF<83>72 85 Q F0(Personal and Group responses whos\
e purpose is to notify the sender of a message of)20.1 E 3(at)97 98 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
111 Q 3(Ti)-.48 G
(ssue the same response to the same sender more than once within a)-3 E
(period of se)97 124 Q -.18(ve)-.3 G(ral days, e).18 E -.18(ve)-.3 G 3
(nt).18 G(hough that sender may ha)-3 E .36 -.18(ve s)-.24 H
(ent multiple messages.).18 E(A)6 E
(7-day period is RECOMMENDED as a def)97 137 Q(ault.)-.12 E F1<83>72
153.6 Q F0(Personal and Group responses whose purpose is to notify the \
sender of a message of)20.1 E 3(at)97 166.6 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
179.6 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 the T)97 192.6 Q
(o, CC, or Bcc \214eld of the subject message.)-.96 E
(Since a recipient may)6 E(ha)97 205.6 Q .36 -.18(ve m)-.24 H
(ultiple addresses forw).18 E
(arded to the same mailbox, recipients SHOULD be)-.12 E(able to specify\
 a set of addresses to the responder which it will recognize as v)97
218.6 Q(alid for)-.3 E(that recipient.)97 231.6 Q F1<83>72 248.2 Q F0
(Responders SHOULD NO)20.1 E 3(Tg)-.48 G(enerate responses for an)-3 E 3
(yn)-.18 G(ull address.)-3 E(Responders)6 E(MA)97 261.2 Q 3(Yr)-1.26 G(\
efuse to generate responses for addresses commonly used as return addre\
sses)-3 E(by responders - e.g. those with local-parts matching "o)97
274.2 Q(wner)-.3 E(-*", "*-request",)-.24 E("MAILER-D)97 287.2 Q
(AEMON", etc.)-.48 E(Responders SHOULD check the destination address)6 E
(for v)97 300.2 Q(alidity before generating the response, to a)-.3 E
-.24(vo)-.24 G(id cluttering up the local mail).24 E
(queues with messages that cannot be deli)97 313.2 Q -.18(ve)-.3 G
(red or are unlik).18 E(ely to be useful.)-.12 E F1<83>72 329.8 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 be sent only for well-formed \
requests.)97 342.8 Q(This may include checking that the message resulti\
ng in the response has a content-)97 355.8 Q
(type and content appropriate to that service.)97 368.8 Q/F2 12
/Times-Bold@0 SF(4. Wher)72 394.8 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 address gi)72
411.4 Q -.18(ve)-.3 G 3(ni).18 G 3(nt)-3 G(he Return-P)-3 E(ath)-.18 E
(\214eld, or if the responder has access to the message en)72 424.4 Q
-.18(ve)-.48 G(lope, the re).18 E -.18(ve)-.3 G(rse-path from the).18 E
(SMTP MAIL command, or \(in a non-SMTP system\) another en)72 437.4 Q
-.18(ve)-.48 G(lope return address).18 E(which serv)72 450.4 Q
(es as the destination for nondeli)-.18 E -.18(ve)-.3 G(ry reports.).18
E(If the Return-P)72 467 Q
(ath \214eld is not present in the subject message, there is a b)-.18 E
(ug in the SMTP)-.24 E(serv)72 480 Q(er that deli)-.18 E -.18(ve)-.3 G
(red the message, or that SMTP serv).18 E
(er is improperly con\214gured.)-.18 E(A)6 E
(Personal or Group responder SHOULD NO)72 493 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)-3 E(that in the Return-P)72 506 Q(ath \214eld, e)
-.18 E -.18(ve)-.3 G 3(ni).18 G 3(ft)-3 G(he Return-P)-3 E
(ath \214eld is missing.)-.18 E(It is better to \214x the)6 E
(problem with the mail deli)72 519 Q -.18(ve)-.3 G
(ry system than to rely on heuristics to guess the appropriate).18 E
(destination of the response.)72 532 Q 3(AS)72 548.6 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 from the From \214eld, or to)-3 E
(another address from the request payload, pro)72 561.6 Q
(vided this beha)-.18 E(vior is precisely de\214ned in)-.24 E
(the speci\214cation for that service.)72 574.6 Q(The Reply-T)6 E 3
<6f8c>-.96 G(eld SHOULD NO)-3 E 3(Tb)-.48 G 3(eu)-3 G(sed for this)-3 E
(purpose.)72 587.6 Q(The Reply-T)72 604.2 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.)72 617.2 Q
(In general, this \214eld is set by a human sender based)6 E
(on his/her anticipation of ho)72 630.2 Q 3(wh)-.3 G
(uman recipients will respond to the speci\214c content of)-3 E
(that message.)72 643.2 Q(Ev)6 E(en for replies from humans, there are \
cases where it is not appropriate to)-.18 E(respond to the Reply-T)72
656.2 Q 3(oa)-.96 G(ddress, especially if the sender has ask)-3 E
(ed that replies be sent to)-.12 E 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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/F0 12/Times-Roman@0 SF 304.368(Internet-Draft 5)72 49 R(June 2002)3 E 3
(ag)72 85 S(roup and/or mailing list.)-3 E
(Since a Personal or Group Responder operates on behalf of a)6 E
(human recipient, it is safer to assume that an)72 98 Q 3(yR)-.18 G
(eply-T)-3 E 3<6f8c>-.96 G(eld present in the message w)-3 E(as)-.12 E
(set by a human sender on the assumption that an)72 111 Q 3(yr)-.18 G
(eply w)-3 E(ould come from a human who)-.12 E(had some understanding o\
f the roles of the sender and other recipients.)72 124 Q(An automatic)6
E(responder lack the information necessary to understand those roles.)72
137 Q(Sending automatic)6 E(responses to Reply-T)72 150 Q 3(oa)-.96 G
(ddresses can thus result in a lar)-3 E(ge number of people recei)-.216
E(ving a)-.3 E(useless or unw)72 163 Q
(anted message; it can also contrib)-.12 E(ute to mail loops.)-.24 E(Us\
e of the From \214eld as the destination for automatic responses has so\
me of the same)72 179.6 Q(problems as use of Reply-T)72 192.6 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
205.6 Q(In general, the From)6 E(and Reply-T)72 218.6 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)72 231.6 Q
(that an address in the From or Reply-T)72 244.6 Q 3<6f8c>-.96 G
(eld is an appropriate destination for the)-3 E(response.)72 257.6 Q
(Similarly)72 274.2 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)72 287.2 R(\214eld is intended only to identify the pe\
rson or entity that sent the)3 E
(message, and is not required to contain an address that is v)72 300.2 Q
(alid for replies.)-.3 E(The Return-P)72 316.8 Q
(ath address is really the only one from the message header that can be)
-.18 E -.18(ex)72 329.8 S(pected, as a matter of protocol, to be suitab\
le for automatic responses that were not).18 E
(anticipated by the sender)72 342.8 Q(.)-.66 E/F1 12/Times-Bold@0 SF
(5. The A)72 368.8 Q(uto-Submitted header \214eld)-.6 E F0(The purpose \
of the Auto-Submitted header \214eld is to indicate that the message w)
72 385.4 Q(as)-.12 E
(originated by an automatic process, or an automatic responder)72 398.4
Q 3(,r)-.48 G(ather than by a human;)-3 E(and to f)72 411.4 Q(acilitate\
 automatic \214ltering of messages from signal paths for which automati\
cally)-.12 E
(generated messages and automatic responses are not desirable.)72 424.4
Q F1(5.1 Syntax)72 450.4 Q F0(The syntax of Auto-Submitted is as follo)
72 467 Q(ws:)-.3 E 12(auto-submitted-\214eld =)108 486 R
("Auto-Submitted:" CFWS)3 E(auto-submitted [CFWS] CRLF)189 499 Q 30
(auto-submitted =)108 525 R 3(\(")3 G(no" / "auto-generated" /)-3 E
("auto-replied" / e)189 538 Q(xtension \))-.18 E(opt-parameter)207 551 Q
(-list)-.24 E -.18(ex)108 577 S 45(tension =).18 F(tok)3 E(en)-.12 E
(opt-parameter)108 603 Q 18(-list =)-.24 F(*\( [CFWS] ";" [CFWS] L)3 E
(WSP parameter \))-.888 E(The symbols "tok)72 635 Q
(en", and "parameter" are as de\214ned in [5].)-.12 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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/F0 12/Times-Roman@0 SF 304.368(Internet-Draft 5)72 49 R(June 2002)3 E
/F1 12/Times-Bold@0 SF(5.2 Semantics)72 85 Q F0
(The Auto-Submitted header \214eld SHOULD NO)72 101.6 Q 3(Tb)-.48 G 3
(es)-3 G(upplied for messages that were)-3 E
(manually submitted by a human.)72 114.6 Q(Such a \214eld MA)6 E 3(Yb)
-1.26 G 3(es)-3 G(upplied for a manually sent mes-)-3 E(sage that is in\
tended to test the response of other mail system components to the pres\
ence)72 127.6 Q(of an Auto-Submitted \214eld in a message.)72 140.6 Q
(The auto-generated k)72 157.2 Q -.18(ey)-.12 G -.12(wo).18 G(rd:).12 E
/F2 14/Times-Roman@0 SF<83>72 173.8 Q F0(SHOULD be used on messages gen\
erated by automatic \(often periodic\) processes)20.1 E
(\(such as UNIX "cron jobs"\),)97 186.8 Q F2<83>72 203.4 Q F0(MUST NO)
20.1 E 3(Tb)-.48 G 3(eu)-3 G(sed on manually generated messages,)-3 E F2
<83>72 220 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)72 236.6 Q -.18(ey)-.12 G -.12(wo).18 G(rd:).12 E F2
<83>72 253.2 Q F0
(SHOULD be used on messages sent in direct response to another message,)
20.1 E F2<83>72 269.8 Q F0(MUST NO)20.1 E 3(Tb)-.48 G 3(eu)-3 G
(sed on manually-generated messages,)-3 E F2<83>72 286.4 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
(The "no" k)72 303 Q -.18(ey)-.12 G -.12(wo).18 G(rd may be used to e)
.12 E(xplicitly indicate that a message w)-.18 E(as originated by a)-.12
E(human.)72 316 Q(Extension k)72 332.6 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)72 345.6 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 [6].)72
358.6 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 e)-.18 E(xperiments and)-.18
E(use among consenting parties.)72 371.6 Q(Optional parameters may also\
 be de\214ned by an IETF Consensus process.)72 388.2 Q(The syntax of)6 E
(optional parameters is gi)72 401.2 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)72 414.2 Q 3(Tf)-.48 G(ail to)
-3.12 E(recognize an Auto-Submitted \214eld and k)72 427.2 Q -.18(ey)
-.12 G -.12(wo).18 G(rd that contains syntactically v).12 E
(alid optional)-.3 E(parameters, b)72 440.2 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)72 453.2 S(rameter names be).18 E(ginning with "x-" are reserv)-.18
E(ed for e)-.18 E(xperiments and use among con-)-.18 E(senting parties.)
72 466.2 Q(The "comment" syntactical construct can be used to indicate \
a reason wh)72 482.8 Q 3(yt)-.06 G(his message)-3 E -.12(wa)72 495.8 S 3
(sa).12 G(uto-submitted.)-3 E F1(6. Security Considerations)72 521.8 Q
F0(Automatic responders introduce the possibility for se)72 538.4 Q -.18
(ve)-.3 G(ral kinds of attack, including:).18 E F2<83>72 555 Q F0
(Use of such responders to relay harmful or ab)20.1 E(usi)-.24 E .36
-.18(ve c)-.3 H(ontent \(w).18 E(orms, viruses, spam,)-.12 E(and sp)97
568 Q(ymail\) for the purpose of wider distrib)-.12 E
(ution of the content or masking the)-.24 E(source of such content;)97
581 Q F2<83>72 597.6 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
610.6 Q(ge numbers of addresses, or to \215ood indi)-.216 E
(vidual mailbox)-.3 E(es with)-.18 E 3(al)97 623.6 S(ar)-3 E
(ge amount of unw)-.216 E(anted content, or both;)-.12 E F2<83>72 640.2
Q F0(Deliberate or accidental use of such responders to construct mail \
loops or "sorcerer')20.1 E(s)-.66 E(apprentice syndrome", thus taxing t\
he resources of the mail transport system;)97 653.2 Q 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 304.368(Internet-Draft 5)72 49 R(June 2002)3 E
/F1 14/Times-Roman@0 SF<83>72 85 Q F0(In addition, the responder itself\
 may be subject to attack by sending it lar)20.1 E(ge numbers)-.216 E
(of requests.)97 98 Q(This document attempts to reduce the vulnerabilit\
y of responders to such attack, in)72 114.6 Q(particular by)72 127.6 Q
F1<83>72 144.2 Q F0(Recommending that responders not relay signi\214can\
t content from the subject)20.1 E
(message \(thus minimizing the potential for ab)97 157.2 Q(usi)-.24 E
.36 -.18(ve c)-.3 H(ontent\)).18 E F1<83>72 173.8 Q F0(Recommending tha\
t responders clearly mark responses with the "Auto-Submitted:)20.1 E(au\
to-replied" header \214eld to distinguish them from messages originated\
 by humans)97 186.8 Q(\(in part, to minimize the potential for loops an\
d denial-of-service attacks\),)97 199.8 Q F1<83>72 216.4 Q F0(Recommend\
ing that Personal and Group Responders limit the number of responses)
20.1 E(sent to an)97 229.4 Q 3(yi)-.18 G(ndi)-3 E
(vidual per period of time \(also limiting the potential damage caused)
-.3 E(by loops\),)97 242.4 Q F1<83>72 259 Q F0(Recommending that respon\
ders respond to at most one address per incoming)20.1 E(message \(to mi\
nimize the potential for deliberate or accidental denial-of-service via)
97 272 Q("multiplication" or sorcerer')97 285 Q 3(sa)-.66 G
(pprentice syndrome\),)-3 E F1<83>72 301.6 Q F0
(Recommending that responses should be brief and in plain te)20.1 E
(xt format \(to minimize)-.18 E(the potential for mail responders to be\
 used as mechanisms for transmitting harmful)97 314.6 Q
(content and/or disguising the source of harmful content\).)97 327.6 Q
(Ho)72 344.2 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)72 357.2 Q 3(response. The)72 370.2 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)72 383.2 Q -.18(ve)-.3 G
(nt attacks.).18 E(This section describes vulnerabilities inherent in a\
utomatically responding to mail.)72 399.8 Q(Other)6 E(vulnerabilities a\
re associated with some mail-based services which automatically respond)
72 412.8 Q(to email messages, b)72 425.8 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.)72 438.8 Q
(In general, all netw)6 E(ork based services \(including those)-.12 E
(accessed by email\) need to pro)72 451.8 Q(vide security that is suf)
-.18 E(\214cient to protect the resources that)-.3 E
(are accessible by the service ag)72 464.8 Q(ainst inappropriate use.)
-.06 E/F2 12/Times-Bold@0 SF(7. IAN)72 490.8 Q 3(AC)-.24 G
(onsiderations)-3 E F0(Section 5 of this document de\214nes tw)72 507.4
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)72 520.4 Q 3(wo)-.3 G
(ptional parameters for the auto-submitted \214eld.)-3 E(If at an)72
533.4 Q 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 paramters are appro).12 E -.18(ve)-.18 G 3(d\()
.18 G(through an IETF)-3 E
(Consensus process\) it may be appropriate for IAN)72 546.4 Q 3(At)-.42
G 3(oc)-3 G(reate a re)-3 E(gistry of such k)-.18 E -.18(ey)-.12 G -.12
(wo).18 G(rds).12 E(or paramters.)72 559.4 Q F2(8. Ackno)72 585.4 Q
(wledgments)-.12 E F0(In the mid-1990s Jeroen Houttuin of TEREN)72 602 Q
3(Aa)-.42 G(uthored a series of internet-drafts on)-3 E("Beha)72 615 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)72 628 Q(ers" [7].)-.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 3(rf).18 G(ormally)-3 E(published, the)
72 641 Q 3(yp)-.18 G(ro)-3 E(vided the \214rst well-reasoned ar)-.18 E
(gument \(kno)-.216 E(wn to this author\) as to the)-.3 E(best w)72 654
Q(ay for such serv)-.12 E(ers to interf)-.18 E
(ace with email systems and protocols.)-.12 E 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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/F0 12/Times-Roman@0 SF 304.368(Internet-Draft 5)72 49 R(June 2002)3 E(\
The idea for the auto-submitted \214eld comes from the X.400/MHS mail s\
ystem [8].)72 85 Q([9])6 E
(de\214ned an "Autosubmitted" \214eld for use when g)72 98 Q(ate)-.06 E
-.12(wa)-.3 G(ying between X.400 and Internet).12 E 3(mail. Jacob)72 111
R -.18(Pa)3 G(lme wrote an internet-draft [10] de\214ning use of the "A\
uto-Submitted" \214eld).18 E(for Internet mail, which made it through L\
ast Call without signi\214cant objections, b)72 124 Q(ut got)-.24 E
(stalled in an attempt to resolv)72 137 Q 3(en)-.18 G
(on-substantial objections.)-3 E(The de\214nition of Auto-)6 E
(Submitted in this document is deri)72 150 Q -.18(ve)-.3 G 3(d\().18 G
(i.e. slightly simpli\214ed\) from the one in that)-3 E
(document, with some te)72 163 Q(xt stolen outright.)-.18 E
(Thanks are also due to those who contrib)72 179.6 Q
(uted suggestions to this document: \(so f)-.24 E(ar\) Eric)-.12 E
(Hall, Florian W)72 192.6 Q(eimer)-.96 E 3(,a)-.48 G(nd Dan W)-3 E(ing.)
-.48 E/F1 12/Times-Bold@0 SF(9. A)72 218.6 Q(uthor')-.6 E 3(sA)-.444 G
(ddr)-3 E(ess)-.216 E F0 -.3(Ke)72 237.6 S(ith Moore).3 E(Inno)72 250.6
Q -.3(va)-.18 G(ti).3 E .36 -.18(ve C)-.3 H(omputing Laboratory).18 E
(Uni)72 263.6 Q -.18(ve)-.3 G(rsity of T).18 E(ennessee, Knoxville)-.84
E(1122 V)72 276.6 Q(olunteer Blvd, #203)-1.548 E
(Knoxville, TN 37996-3450)72 289.6 Q(moore@cs.utk.edu)72 315.6 Q F1
(10. Refer)72 347.6 Q(ences)-.216 E F0 8.008([1] Moore,)72 364.2 R(K. V)
3 E(audreuil, G.)-1.332 E(An Extensible Message F)6 E(ormat for Deli)
-.18 E -.18(ve)-.3 G(ry Status Noti\214-).18 E 3(cations. RFC)97 377.2 R
(1894, January 1996. \(non-normati)3 E .36 -.18(ve r)-.3 H(eference\))
.18 E 8.008([2] F)72 393.8 R(ajman, R.)-.18 E(An Extensible Message F)6
E(ormat for Message Disposition Noti\214cations.)-.18 E
(RFC 2298, March 1998.)97 406.8 Q(\(non-normati)6 E .36 -.18(ve r)-.3 H
(eference\)).18 E 8.008([3] Bradner)72 423.4 R 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(2119,)3 E(March 1997.)97 436.4 Q
(\(normati)6 E .36 -.18(ve r)-.3 H(eference\)).18 E 8.008([4] Moore,)72
453 R 3(K. SMTP)3 F(Service Extension for Deli)3 E -.18(ve)-.3 G
(ry Status Noti\214cations.).18 E(RFC 1891,)6 E(January 1996.)97 466 Q
(\(normati)6 E .36 -.18(ve r)-.3 H(eference, b).18 E(ut only barely\))
-.24 E 8.008([5] Freed,)72 482.6 R(N. Borenstein, N.)3 E
(Multipurpose Internet Mail Extensions \(MIME\) P)6 E(art One:)-.18 E
-.18(Fo)97 495.6 S(rmat of Internet Message Bodies.).18 E(RFC 2045, No)6
E -.18(ve)-.18 G(mber 1996.).18 E(\(normati)6 E .36 -.18(ve r)-.3 H
(efer).18 E(-)-.24 E(ence\))97 508.6 Q 8.008([6] Narten,)72 525.2 R
-.888(T.)3 G 3(,A).888 G(lv)-3 E(estrand, H.)-.18 E
(Guidelines for Writing an IAN)6 E 3(AC)-.42 G(onsiderations Section)-3
E(in RFCs.)97 538.2 Q(RFC 2434, October 1998.)6 E(\(normati)6 E .36 -.18
(ve r)-.3 H(eference\)).18 E 8.008([7] Houttuin,)72 554.8 R
(J. BoMBS series: Beha)3 E(vior of Mail Based Serv)-.24 E(ers / P)-.18 E
(art 2: A-BoMBS /)-.18 E(Answering Serv)97 567.8 Q 3(ers. Expired)-.18 F
(Internet-Draft draft-rare-msg-a-bombs-01.txt, Decem-)3 E(ber 1994.)97
580.8 Q -1.524 -.888(Av a)6 H
(ilable at http://google.com/ \(non-normati).888 E .36 -.18(ve r)-.3 H
(eference, w).18 E(ork appar)-.12 E(-)-.24 E
(ently no longer in progress, included only for attrib)97 593.8 Q
(ution\))-.24 E 8.008([8] X.400.)72 610.4 R
(\(perhaps someone can supply the correct reference for the \214rst v)6
E(ersion of)-.18 E(the X.400 document to de\214ne autosubmitted?\))97
623.4 Q(\(non-normati)6 E .36 -.18(ve r)-.3 H(eference\)).18 E 8.008
([9] Kille,)72 640 R 3(S. MIXER)3 F
(\(Mime Internet X.400 Enhanced Relay\): Mapping between X.400)3 E
(and RFC 822/MIME.)97 653 Q(RFC 2156, January 1998.)6 E(\(non-normati)6
E .36 -.18(ve r)-.3 H(eference\)).18 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 304.368(Internet-Draft 5)72 49 R(June 2002)3 E
([10])72 85 Q -.18(Pa)97 98 S(lme, J.).18 E
("The Auto-Submitted and Expires Headers in E-mail".)6 E
(Expired Internet-)6 E(Draft "draft-ietf-maile)97 111 Q(xt-ne)-.18 E
(w-\214elds-15.txt", February 1999. \(non normati)-.3 E .36 -.18(ve r)
-.3 H(efer).18 E(-)-.24 E(ence, w)97 124 Q
(ork apparently no longer in progress, included only for attrib)-.12 E
(ution\))-.24 E 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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