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We changing our internal infrastructure and replacing old Linux server with an OS X Lion server. One crucial thing is email - need migrate it without interruption. Currently we have Linux/Cyrrus, with zilion of stored emails for tens of local users.

Here: How setup Mail.app IMAP to migrate Mail Server is recommennded doing it via local mail client, what is ok for external imap-server for one user, but not practical for the full server-migrate.

What is the recommended way migrate the whole mail-handling from Linux cyrrus/postfix into OS X Lion dovecot? Know anyone some scripts (preferable perl) what can help with the migrating?

My current idea:

  • setup DNS, Users, and email handling on the Lion server
  • stop the mailserver on the Linux
  • migrate all emails (with some script)
  • change MX record from Linux to Lion
  • start using Lion

Any guides, caveats and/or any helpful comments?

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2 Answers 2

up vote 1 down vote accepted

There's a Cyrus2Dovecot migration tool developed by Freie Universität Berlin.

Cyrus2Dovecot is a full-featured command line tool for converting the e-mails of one or more users from Cyrus format to Dovecot Maildir++ folders. It allows for performing a server transition which is fully transparent to both POP and IMAP users.

And other migration solutions in the Dovecot wiki.

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Nice, thank you very much. Is here any OS X Lion "speciality" about what i need care? Based on you answer i found this: afp548.com/forum/viewtopic.php?showtopic=25169 . Any other things? –  kobame Mar 28 '12 at 11:51

For other people that come here asking this:

Use imapsync, you can get it via macports.

macports

imapsync home page

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Thanks for your answer, gbrandt! Can you please add a link to the software you mention in your answer? It is always helpful to add a link to help the OP to find the right software. Thank you. –  daviesgeek Jul 16 '12 at 18:44

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