[Dovecot] BestPractice to migrate imap mailbox from one machine to another

[Tobias Hachmer]

On Fri, 09 Sep 2011 15:22:54 +0200, Robert Schetterer wrote:
> Am 09.09.2011 15:14, schrieb Tobias Hachmer:
>> What is the best way to copy the existing mailboxes from the older
>> machine running dovecot v1.2.15 to the new naked machine?
>
> i used imapsync in a bash script
> http://ks.lamiral.info/imapsync/
> at a massive migration

ok, but this tool is not free of charge.
Are there any known problems just copying the mailboxes with scp or 
rsync?

Tobias