Dovecot has a few hidden features currenly, which I know some webmails have been
hardcoded to use. Maybe it would be nice to have these available in a bit more
globally usable way and advertise some kind of X-DOVECOT capability? I don't
really like the idea of having a ton of separate X-DOVECOT-* capabilities. Maybe
instead just have X-DOVECOT-1 for the current functionality and when more is
added X-DOVECOT-2 etc? Then describe in Dovecot wiki page what they actually
contain. Thoughts?
The current list of features are at least:
- STATUS (X-SIZE): Sum of all RFC822.SIZEs in a mailbox. (More efficient than
FETCHing them.)
- STATUS (X-GUID): Show mailbox's GUID.
- SEARCH X-SAVEDBEFORE, X-SAVEDON, X-SAVEDSINCE: Search with message's
saved-timestamp.
- FETCH X-SAVEDATE: Fetch message's saved-timestamp.
- SEARCH & FETCH X-GUID: Search/fetch message GUID
- SEARCH X-MAILBOX, FETCH X-MAILBOX, FETCH X-REAL-UID: With virtual mailboxes
search/fetch the mail's physical mailbox name and message UID.
- X-CANCEL <tag>: Stop a (long-running) command, which once in a while
goes back to the main loop. For example SEARCH or FETCH.
