[MlMt] Moving/copying messages between IMAP accounts

[AC-Martin]

Is it possible to move/copy messages across IMAP accounts?

I just tried it with a few messages by moving.  The messages were moved 
locally, but didn't appear server side when I checked with webmail.  
There's no copy option either.

On thinking, with the current smart mailbox setup and one message 
database, it seems as if it shouldn't be possible to move messages 
across accounts?

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Curtis acm