[Dovecot] IMAP extensions & their meanings

[Brian Candler]

On Thu, Apr 01, 2010 at 04:15:35PM -0400, Jerry wrote:
> I know that is is not really a Dovecot problem; however, I was
> wondering where I could get a complete list of the terms used in the
> 'capability' line. I have not had any success in finding out what
> things like "XLIST" refer to. I don't believe that is one that Dovecot
> uses; however, I have seen it with other IMAP servers, plus lots of
> other flags that I do not understand.
> 
> I tried Googling but only got a few sporadic and basically useless
> answers.

Google "IANA registry IMAP capabilities" (without the quotes). First hit is
what you want; follow each RFC reference for more details.

Capabilities which begin with "X" are non-standard, and you'll have to
search for them separately.

For a general description of the CAPABILITY syntax see RFC3501 (sec 6.1.1
and 7.2.1)

HTH,

Brian.