Server migration

[Sami Ketola]

> On 28 Oct 2016, at 16.54, Tanstaafl <tanstaafl at libertytrek.org> wrote:
> 
> On 10/27/2016 8:36 AM, Timo Sirainen <tss at iki.fi> wrote:
>> On 27 Oct 2016, at 15:29, Tanstaafl <tanstaafl at libertytrek.org> wrote:
>>> On 10/26/2016 2:38 AM, Gandalf Corvotempesta
>>>> my only question is: how to manage the email received on the new server
>>>> during the last rsync phase?
>>> 
>>> Use IMAPSync - much better than rsync for this.
> 
>> imapsync will change IMAP UIDs and cause clients to redownload all
>> mails. http://wiki2.dovecot.org/Migration/Dsync should work though.
> 
> Oh... I thought the --useuid option eliminated this problem?
> 
> https://imapsync.lamiral.info/FAQ.d/FAQ.Duplicates.txt

It does not. There is no option at IMAP level to set the UID.

In this case —useuid seems to keep track on source:uid -> dest:uid pairs on multiple syncs
and uses uid numbers to avoid syncing mails as duplicates instead of using headers to do that.

Sami