[Dovecot] Dovecot 1.x POP3 to Dovecot 2.x POP3 mbox to Maildir best transfer program/method

[Timo Sirainen]

On 7.9.2012, at 22.32, Tim E. wrote:

> I have a  box running Dovecot 1.x POP3 only server using mbox format. I want to port the mail over to a Centos 6.3 box running a Dovecot 2.x POP3 only server using Maildir format. The main thing I want to do is support 
> XUID/read/unread status so the transfer is transparent for the end user. I have been able to achieve transfers from the mbox format to Maildir 
> but loose the XUID/read/unread status so that the Thunderbird client always re-downloads all the mail as if it were new. Ive googled and I have tried the following:
> 
> dsync : dovecot 1.x server is too old and doesnt support the command?
> mb2md.pl: transfers the mbox to maildir and creates file dovecot-uidlist but the Thunderbird client redownloads the files
> virtualmin copy-mailbox: transfers the mailbox to Maildir but doesnt reproduce the dovecot indexes.
> 
> Any thoughts would be appreciated.
> I would like to produce a howto of the process when I am done.

Copy the mboxes to the new v2.x server and use dsync to convert them to maildir.