Requests for Comments (RFCs) are documents issued by the Internet Engineering Task Force (IETF) at the Network Information Center (NIC). Each such document defines an aspect of protocol surrounding the Internet. We have listed the RFCs that pertain to sendmail in reverse numeric orderthat is, with the most recent documents cited first. Note that many of these are of interest only to historians. RFCs are available via the Web and anonymous FTP from: http://www.ietf.org.
SMTP Service Extension for Secure SMTP over Transport Layer Security P. Hoffman, February 2002, 7 pp.
SMTP Service Extension for Command Pipelining N. Freed, September 2000, 9 pp.
Deliver by SMTP Service Extension D. Newman, June 2000, 13 pp.
Internet Message Format P. Resnick, Editor, April 2001, 51 pp.
Simple Mail Transfer Protocol J. Klensin, Editor, April 2001, 79 pp.
SMTP Service Extension for Secure SMTP over TLS J. Myers, March 1999, 11 pp.
SMTP Service Extension for Secure SMTP over TLS P. Hoffman, January 1999, 8 pp.
Message Submission R. Gellens, J. Klensin, December 1998, 15 pp.
Mailbox Names for Common Services, Roles and Functions D. Crocker, May 1997, 6 pp.
Local Mail Transfer Protocol J. Myers, October 1996, 7 pp.
SMTP Service Extension for Remote Message Queue Starting J. De Winter, August 1996, 7 pp.
An Extensible Message Format for Delivery Status Notifications K. Moore, G. Vaudreuil, January 1996, 15 pp.
Enhanced Mail System Status Codes G. Vaudreuil, January 1996, 15 pp.
The Multipart/Report Content Type for the Reporting of Mail System Administrative Messages G. Vaudreuil, January 1996, 4 pp.
SMTP Service Extension for Delivery Status Notifications K. Moore, January 1996, 31 pp.
Message/External-Body Content-ID Access Type E. Levinson, December 1995, 4 pp.
The MIME Multipart/Related Content-type E. Levinson, December 1995, 8 pp.
SMTP Service Extension for Message Size Declaration J. Klensin, N. Freed, K. Moore, November 1995, 9 pp.
SMTP Service Extensions J. Klensin, N. Freed, M. Rose, E. Stefferud, D. Crocker, November 1995, 11 pp.
The Content-MD5 Header Field J. Myers, M.Rose, October 1995, 4 pp.
SMTP Service Extension for Command Pipelining N. Freed, October 1995, 21 pp.
SMTP 521 Reply Code A. Durand, F. Dupont, September 1995, 4 pp.
SMTP Service Extension for Checkpoint/Restart N. Freed (editor), D. Crocker, September 1995, 7 pp.
Multimedia E-mail (MIME) User Agent Checklist E. Huizer, August 1995, 8 pp.
SMTP Service Extensions for Transmission of Large and Binary MIME Messages G. Vaudreuil, August 1995, 8 pp.
Classifications in E-mail Routing J. Houttuin, October 1994, 19 pp.
SMTP Service Extensions for 8bit-MIMEtransport J. Klensin, N. Freed, M. Rose, E. Stefferud, D. Crocker, July 1994, 6 pp.
Mail Monitoring MIB N. Freed (ed), S. Killy, January 1994, 20 pp.
Representation of Non-ASCII Text in Internet Message Headers K. Moore, September 1993, 7 pp.
MIME (Multipurpose Internet Mail Extensions): Mechanisms for Specifying and Describing the Format of Internet Message Bodies N. Borenstein and N. Freed, September 1993, 69 pp.
Encoding Header Field for Internet Messages D. Robinson, R. Ullmann, August 1993, 36 pp.
X.400 1988 to 1984 Downgrading S.E. Hardcastle-Kille, August 1993, 5 pp.
Mapping Between X.400(1988)/ISO 10021 and RFC 822 S.E. Hardcastle-Kille, August 1993, 11 pp. (Updates RFC1327)
Transition of Internet Mail from Just-Send-8 to 8bit-SMTP/MIME G, Vaudreuil, February 1993, 6pp.
Privacy Enhancement for Internet Electronic Mail: Part IIIAlgorithms, Modes, and Identifiers J. Linn, February 1993, 14pp.
Privacy Enhancement for Internet Electronic Mail: Part IICertificate-Based Key Management S.T. Kent and J. Linn, February 1993, 32 pp.
Privacy Enhancement for Internet Electronic Mail: Part IMessage Encipherment and Authentication Procedures J. Linn, February 1993, 42 pp.
Character Mnemonics and Character Sets K. Simonsen, June 1992, 103 pp.
Implications of MIME for Internet Mail Gateways N. Borenstein, June 1992, 8 pp.
User Agent Configuration Mechanism for Multimedia Mail Format Information N. Borenstein, June 1992, 10 pp.
MD5 Message-Digest Algorithm R.L. Rivest, April 1992, 21 pp.
MD4 Message-Digest Algorithm R.L. Rivest, April 1992, 20 pp.
MD2 Message-Digest Algorithm B.S. Kaliski, April 1992, 17 pp. (Updates RFC1115)
Interactive Mail Access Protocol: Version 2 M.R. Crispin, August 1990, 30 pp.
Digest Message Format F.J. Wancho, April 1990, 4pp.
Mapping Between Full RFC822 and RFC822 with Restricted Encoding S.E. Kille, December 1989, 3 pp. (Updates RFC976)
Requirements for Internet HostsApplication and Support R.T. Braden, ed., October 1989, 98 pp.
Requirements for Internet HostsCommunication Layers R.T. Braden, ed; October 1989; 116 pp.
Standard for Interchange of USENET Messages M.R. Horton and R. Adams, December 1987, 19 pp. (Obsoletes RFC850)
UUCP Mail Interchange Format Standard M.R. Horton, February 1986, 12 pp.
Proposed Standard for Message Encapsulation M.T. Rose and E.A. Stefferud, January 1985, 10 pp.
Standard for the Format of ARPA Internet Text Messages D. Crocker; August 13, 1982; 47 pp. (Obsoletes RFC733; updated by RFC1327)
Simple Mail Transfer Protocol J.B. Postel, August 1982, 58 pp. (Obsoletes RFC788)
Computer Mail Meeting Notes J.B. Postel; February 8, 1982; 6pp.
Standard for the Format of ARPA Network Text Messages D. Crocker, J. Vittal, K.T. Pogran, and D.A. Henderson; November 21, 1977; 38 pp. (Obsoletes RFC724; obsoleted by RFC822)
On the Junk Mail Problem J.B. Postel; November 8; 1975; 1 p.