imap2maildir
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Better UID handling
Per the RFC: http://tools.ietf.org/html/rfc3501#section-2.3.1.1
- The combination of mailbox name, uidvalidity value, and uid is unique on a server
- If uidvalidity increments, uids are no longer guaranteed to be as they were for a lower uidvalidity
- uids are assigned in a strictly ascending order
I think this could be used to improve uid handling a lot.