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11.2.4 Conformity

No rebels without a clue here, ma'am. We conform to all standards known to (wo)man. Except for those standards and/or conventions we disagree with, of course.

RFC (2)822
There are no known breaches of this standard.
RFC 1036
There are no known breaches of this standard, either.
Son-of-RFC 1036
We do have some breaches to this one.
These are considered to be “vanity headers”, while I consider them to be consumer information. After seeing so many badly formatted articles coming from tin and Netscape I know not to use either of those for posting articles. I would not have known that if it wasn't for the X-Newsreader header.

USEFOR is an IETF working group writing a successor to RFC 1036, based on Son-of-RFC 1036. They have produced a number of drafts proposing various changes to the format of news articles. The Gnus towers will look into implementing the changes when the draft is accepted as an RFC.
MIME—RFC 2045–2049 etc
All the various MIME RFCs are supported.
Disposition Notifications—RFC 2298
Message Mode is able to request notifications from the receiver.
PGP—RFC 1991 and RFC 2440
RFC 1991 is the original PGP message specification, published as an informational RFC. RFC 2440 was the follow-up, now called Open PGP, and put on the Standards Track. Both document a non-MIME aware PGP format. Gnus supports both encoding (signing and encryption) and decoding (verification and decryption).
PGP/MIME—RFC 2015/3156
RFC 2015 (superseded by 3156 which references RFC 2440 instead of RFC 1991) describes the MIME-wrapping around the RFC 1991/2440 format. Gnus supports both encoding and decoding.
RFC 2633 describes the S/MIME format.
IMAP—RFC 1730/2060, RFC 2195, RFC 2086, RFC 2359, RFC 2595, RFC 1731
RFC 1730 is IMAP version 4, updated somewhat by RFC 2060 (IMAP 4 revision 1). RFC 2195 describes CRAM-MD5 authentication for IMAP. RFC 2086 describes access control lists (ACLs) for IMAP. RFC 2359 describes a IMAP protocol enhancement. RFC 2595 describes the proper TLS integration (STARTTLS) with IMAP. RFC 1731 describes the GSSAPI/Kerberos4 mechanisms for IMAP.

If you ever notice Gnus acting non-compliant with regards to the texts mentioned above, don't hesitate to drop a note to Gnus Towers and let us know.