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On Tue, 28 Aug 2007, Gunter Ohrner wrote:
I used UW-Imap's mailutil with success, but to copy an existing Mailbox to
a fresh one using just IMAP. This is not your case.
So, does anyone have any pratical solution on how to migrate one IMAP
mailbox to another? For various reasons I'd really prefer to go with a
Well, the first thing is how do you want to decide, which mails are
"identical".
I have great success with Maildir-based mailboxes by simply running a file
dupe checker across both mailboxes and delete the duplicates from the
"old" one. There was pretty few stuff left.
Way back, when we had some mboxes among the Maildirs, I transformed the
mbox to Maildir, crafted a perl script that extracted the message ID and
- From line from the mails and deleted any dup from the "old" mailbox (and
compared the body before, just to be sure).
cannot seem to get reliably support from its authors and/or its user
community... :-/
Be yourself.
You have to make your own rules about what you consider as "equal"
messages, e.g. when the two mailbox syncs lay one month apart:
+ The user moved a message to another folder in the "new" mail store.
+ The user has the message multiple times in his mail folders. (Even
within the _same_ folder). This can happen intenionally and not.
+ The "same" message arrived the user multiple times through different
hops - the body and the essential headers (From, MessageID, To, ...) are
the same, but not Received and "custom" headers (e.g. Virus scan notices).
I would not rely on another tool.
Bye,
- --
Steffen Kaiser
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