Re: What does it mean that mail mode doesn't support MIME?

[Eli Zaretskii]

> From: BP25 <bp25@riseup.net>
> Date: Sat, 27 Apr 2024 13:45:47 +0100
> 
> I read: "Prior to Emacs 23.2, the default mode was Mail mode, which is
> similar to Message mode in many respects but lacks features such as MIME
> support." and also "The most typical thing users want to use the
> multipart things in MIME for is to add “attachments” to mail they send
> out." From this I deduced that mail mode doesn't support attachments.
> 
> However, mail mode supports attachments (use the mail-add-attachment
> command to do that) and C-h f mail-add-attachment says it adds it as
> MIME attachment! I deduce that attachments are in the "universe" of
> MIME, and by "lacks feature such as MIME support" really the manual
> meant "lacks features such as complete and total MIME support", right?

Right.

> This begs the question: What MIME things then does mail mode then not
> support? I couldn't find info on the manual but if you direct me to some
> reference I'd be very grateful.

For that, you'll need to read the documentation of message-mode (in
the Gnus manual), and probably also the Emacs MIME manual.