[Imap-protocol] MOVE is a pipeline

[Lyndon Nerenberg]

> How does everyone handle a large folder, say 500,000 messages?  In order to 

> process sequence numbers, you have to

> know which messages are in the set.  The few implementations I've seen do 

> this by loading the messages into a cache.


Bloom filters get you most of the way there.

--lyndon