[Mailsync-list] When does mailsync delete duplicate messages?

[Chris G. <ch...@ar...>]

In the mailsync README file it says:-

    Mailsync deletes duplicate messages by default - assuming that they're the
    same. However if it finds multiple messages with empty Message-IDs it will
    display the message:

            "Not deleting duplicate message with empty Message-ID - see README"

    and leave that message alone, supposing that this is just another email
    produced by weird software.

What does this mean?  Does it delete duplicate messages it finds in
one store mailbox? Will it delete a duplicate message found in a
*different* mailbox?  Does it only delete duplicate messages when
actually doing a synchronise operation?

-- 
Chris Green (ch...@ar...)

    "Never ascribe to malice that which can be explained by incompetence."