[Dovecot] Maildir migration and uids

[Timo Sirainen]

On 22.12.2011, at 3.52, David Jonas wrote:

> I'm in the process of migrating a large number of maildirs to a 3rd
> party dovecot server (from a dovecot server). Tests have shown that
> using imap to sync the accounts doesn't preserve the uidl for pop3 access.
> 
> My current attempt is to convert the maildir to mbox and add an X-UIDL
> header in the process. Run a second dovecot that serves the converted
> mbox. But dovecot's docs say, "None of these headers are sent to
> IMAP/POP3 clients when they read the mail".

That's rather complex.

> Is there any way to sync these maildirs to the new server and maintain
> the uids?

What Dovecot versions? dsync could do this easily. You could simply install the dsync binary even if you're using Dovecot v1.x.

You could also log in with POP3 and get the UIDL list and write a script to add them to dovecot-uidlist.