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.
There are no known breaches of this standard or its successors (currently RFCs 2822 and 5322).
There are no known breaches of this (now-obsolete) standard, either.
We do have some breaches of this standard, the successor of RFC 1036.
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 was an IETF working group that produced Internet RFCs 5536 and 5537. The Gnus towers will look into implementing the changes embodied by these standards.
All the various MIME RFCs are supported.
Message Mode is able to request notifications from the receiver.
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).
RFC 2015 (superseded by 3156 which references RFC 2440 instead of RFC 1991) describes the MIME-wrapping around the RFC 1991/2440 format.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.
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.