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Document Date Status IPR AD/Shepherd
Active Internet-Drafts (7 hits)
11 pages
draft-ietf-emailcore-iana-cleanup-03
Updates to SMTP related IANA registries
2026-06-24
I-D Exists
WG Document
Murray Kucherawy
13 pages
draft-ietf-mailmaint-interoperable-addresses-03
Interoperable Email Addresses for SMTPUTF8
2026-03-02
I-D Exists
WG Document : Proposed Standard
Jul 2026
8 pages 2026-07-06
New
I-D Exists
WG Document : Proposed Standard
Jul 2026
5 pages
draft-melnikov-smtp-rememberme-00
SMTP REMEMBERME extension for quick reauthentication token generation
2026-05-29
I-D Exists
8 pages
draft-nurpmeso-smtp-tls-srv-07
Secure SMTP/TLS SRV Announcement
2026-04-24
I-D Exists
4 pages
draft-nurpmeso-smtp-verp-02
SMTP VERP Service Extension
2026-04-24
I-D Exists
17 pages
draft-storey-smtp-client-id-21
SMTP Service Extension for Client Identity
2026-05-26
I-D Exists
Dead WG Document
Jul 2024 		2
RFCs (55 hits)
13 pages
RFC 876
Survey of SMTP implementations
1983-09
Unknown RFC
3 pages
RFC 1047
Duplicate messages and SMTP
1988-02
Unknown RFC
4 pages
RFC 1090
SMTP on X.25
1989-02
Unknown RFC
10 pages
RFC 1425
SMTP Service Extensions
1993-02
Proposed Standard RFC
Obsoleted by rfc1651
6 pages
RFC 1426
SMTP Service Extension for 8bit-MIMEtransport
1993-02
Proposed Standard RFC
Obsoleted by rfc1652
8 pages
RFC 1427
SMTP Service Extension for Message Size Declaration
1993-02
Proposed Standard RFC
Obsoleted by rfc1653
6 pages
RFC 1428
Transition of Internet Mail from Just-Send-8 to 8bit-SMTP/MIME
1993-02
Informational RFC
11 pages
RFC 1651
SMTP Service Extensions
1994-07
Draft Standard RFC
Obsoleted by rfc1869
6 pages
RFC 1652
SMTP Service Extension for 8bit-MIMEtransport
1994-07
Draft Standard RFC
Obsoleted by rfc6152
8 pages
RFC 1653
SMTP Service Extension for Message Size Declaration
1994-07
Draft Standard RFC
Obsoleted by rfc1870
8 pages
RFC 1830
SMTP Service Extensions for Transmission of Large and Binary MIME Messages
1995-08
Experimental RFC
Obsoleted by rfc3030
7 pages
RFC 1845
SMTP Service Extension for Checkpoint/Restart
1995-09
Experimental RFC
4 pages
RFC 1846
SMTP 521 Reply Code
1995-09
Experimental RFC
Updated by rfc7504
7 pages
RFC 1854
SMTP Service Extension for Command Pipelining
1995-10
Proposed Standard RFC
Obsoleted by rfc2197
11 pages
RFC 1869
SMTP Service Extensions
1995-11
Internet Standard RFC
Obsoleted by rfc2821
Part of STD 10
9 pages
RFC 1870
SMTP Service Extension for Message Size Declaration
1995-11
Internet Standard RFC
Part of STD 10
31 pages
RFC 1891
SMTP Service Extension for Delivery Status Notifications Errata
1996-01
Proposed Standard RFC
Obsoleted by rfc3461
7 pages
RFC 1985
SMTP Service Extension for Remote Message Queue Starting Errata
1996-08
Proposed Standard RFC
6 pages
RFC 2034
SMTP Service Extension for Returning Enhanced Error Codes
1996-10
Proposed Standard RFC
8 pages
RFC 2197
SMTP Service Extension for Command Pipelining
1997-09
Draft Standard RFC
Obsoleted by rfc2920
9 pages
RFC 2442
The Batch SMTP Media Type
1998-11
Informational RFC
8 pages
RFC 2487
SMTP Service Extension for Secure SMTP over TLS
1999-01
Proposed Standard RFC
Obsoleted by rfc3207
24 pages
RFC 2505
Anti-Spam Recommendations for SMTP MTAs
1999-02
Best Current Practice RFC
Also known as BCP 30
11 pages
RFC 2554
SMTP Service Extension for Authentication
1999-03
Proposed Standard RFC
Obsoleted by rfc4954
9 pages
RFC 2645
ON-DEMAND MAIL RELAY (ODMR) SMTP with Dynamic IP Addresses Errata
1999-08
Proposed Standard RFC
79 pages
RFC 2821
Simple Mail Transfer Protocol Errata
2001-04
Proposed Standard RFC
Obsoleted by rfc5321
Updated by rfc5336
13 pages
RFC 2852
Deliver By SMTP Service Extension Errata
2000-06
Proposed Standard RFC
9 pages
RFC 2920
SMTP Service Extension for Command Pipelining
2000-09
Internet Standard RFC
Also known as STD 60
12 pages
RFC 3030
SMTP Service Extensions for Transmission of Large and Binary MIME Messages Errata
2000-12
Proposed Standard RFC
9 pages
RFC 3207
SMTP Service Extension for Secure SMTP over Transport Layer Security Errata
2002-02
Proposed Standard RFC
Updated by rfc7817
38 pages
RFC 3461
Simple Mail Transfer Protocol (SMTP) Service Extension for Delivery Status Notifications (DSNs) Errata
2003-01
Draft Standard RFC
Updated by rfc3798, rfc3885, rfc5337, rfc6533, rfc8098 		Ned Freed
4 pages
RFC 3848
ESMTP and LMTP Transmission Types Registration
2004-07
Draft Standard RFC 		Alexey Melnikov
19 pages
RFC 3865
A No Soliciting Simple Mail Transfer Protocol (SMTP) Service Extension
2004-09
Proposed Standard RFC 		Harald T. Alvestrand
9 pages
RFC 3885
SMTP Service Extension for Message Tracking
2004-09
Proposed Standard RFC 		Scott Hollenbeck
10 pages
RFC 3974
SMTP Operational Experience in Mixed IPv4/v6 Environments
2005-01
Informational RFC 		Bert Wijnen
26 pages
RFC 4141
SMTP and MIME Extensions for Content Conversion Errata
2005-11
Proposed Standard RFC 		Scott Hollenbeck
14 pages
RFC 4405
SMTP Service Extension for Indicating the Responsible Submitter of an E-Mail Message
2006-04
Historic RFC 		1 Ted Hardie
12 pages
RFC 4496
Open Pluggable Edge Services (OPES) SMTP Use Cases
2006-05
Informational RFC 		Ted Hardie
11 pages
RFC 4865
SMTP Submission Service Extension for Future Message Release Errata
2007-05
Proposed Standard RFC 		Ted Hardie
14 pages
RFC 4902
Integrity, Privacy, and Security in Open Pluggable Edge Services (OPES) for SMTP
2007-05
Informational RFC 		Ted Hardie
20 pages
RFC 4954
SMTP Service Extension for Authentication Errata
2007-07
Proposed Standard RFC
Updated by rfc5248 		Lisa M. Dusseault
11 pages
RFC 5248
A Registry for SMTP Enhanced Mail System Status Codes Errata
2008-06
Best Current Practice RFC
Also known as BCP 138 		Chris Newman
22 pages
RFC 5336
SMTP Extension for Internationalized Email Addresses Errata
2008-09
Experimental RFC
Obsoleted by rfc6531 		Chris Newman
7 pages
RFC 6152
SMTP Service Extension for 8-bit MIME Transport
2011-03
Internet Standard RFC
Also known as STD 71 		Alexey Melnikov
18 pages
RFC 6531
SMTP Extension for Internationalized Email Errata
2012-02
Proposed Standard RFC 		Pete Resnick
17 pages
RFC 6647
Email Greylisting: An Applicability Statement for SMTP
2012-06
Proposed Standard RFC 		Barry Leiba
28 pages
RFC 6710
Simple Mail Transfer Protocol Extension for Message Transfer Priorities Errata
2012-08
Proposed Standard RFC 		Pete Resnick
11 pages
RFC 6758
Tunneling of SMTP Message Transfer Priorities
2012-10
Informational RFC 		Pete Resnick
24 pages
RFC 7293
The Require-Recipient-Valid-Since Header Field and SMTP Service Extension
2014-07
Proposed Standard RFC 		Barry Leiba
7 pages
RFC 7504
SMTP 521 and 556 Reply Codes
2015-06
Proposed Standard RFC 		Barry Leiba
34 pages
RFC 7672
SMTP Security via Opportunistic DNS-Based Authentication of Named Entities (DANE) Transport Layer Security (TLS) Errata
2015-10
Proposed Standard RFC 		Stephen Farrell
34 pages
RFC 8460
SMTP TLS Reporting Errata
2018-09
Proposed Standard RFC 		Alexey Melnikov
29 pages
RFC 8461
SMTP MTA Strict Transport Security (MTA-STS) Errata
2018-09
Proposed Standard RFC 		Alexey Melnikov
16 pages
RFC 8689
SMTP Require TLS Option Errata
2019-11
Proposed Standard RFC 		Alexey Melnikov
11 pages
RFC 9422
The LIMITS SMTP Service Extension
2024-02
Proposed Standard RFC 		Murray Kucherawy