Recommended tool for migrating IMAP servers

[Steve Litt]

On Mon, 4 Dec 2017 12:53:15 -0800 (PST)
Joseph Tam <jtam.home at gmail.com> wrote:

> "Davide Marchi" <danjde at msw.it> writes:
> 
> >> UW-IMAP's mailutil, imapsync, YippieMove and Larch.  
> 
> Whatever you use, *don't* use UW-IMAP's mailutil unless you got lots
> of time to kill.  It is dreadfully slow -- I used it to export some of
> my users' mailboxes to Gmail or other remote mail servers, and I could
> almost cut&paste the messages faster.
> 
> Like Aki said, if you have the same mailbox format and FS access on
> both sides, rsync is much simpler.  You can also try exporting the
> old mailboxes via NFS, and with some artful symlinks, march through
> your user mailboxes replacing the symlinks with the instantiated
> local copies and have almost zero downtime.
> 
> Joseph Tam <jtam.home at gmail.com>

Another possibility is to use an email client like Claws-Mail, which is
very fast, create two accounts: One for the old IMAP, one for the new
one, and just copy trees.

SteveT

Steve Litt 
November 2017 featured book: Troubleshooting: Just the Facts
http://www.troubleshooters.com/tjust