2016-10-24 14:47 GMT+02:00 Michael Seevogel <m...@ddnetservice.de>: > If your server OS supports newer Dovecot versions then I would highly > suggest you to upgrade to Dovecot 2.2.xx (or at least to the latest 2.1) and > set up Dovecot's replication[1] feature.
Are you talking about the new server or the older one that I have to replace? The new server has to be installed from scratch, so, yes, I can use Dovecot 2.2 from Jessie The "old" server is based on Squeeze, I can upgrade that to Wheezy and install Dovecot 2.2 from wheezy-backports but I have huge trouble when I've tried to do the same on a similiar server. I was unable to upgrade the dovecot configuration by following the documentation as this didn't work: doveconf -n -c /etc/dovecot/dovecot.conf > dovecot-2.conf I had an empty dovecot-2.conf file, no warning or output at all. It did nothing. > With this method you can actually archieve a smooth migration while your > current server replicates all emails in real time to your new server, > including new incoming emails and also mailbox changes to your new server > and when the migration is done you'll just have to change your DNS and > disable the Replication service. Cool. Any guide about this ? Should I start the replication on one side and wait for finish before pointing the mailbox to the new server? > If you don't want or cannot set up replication you could still do a one-shot > migration via Dovecot's dsync[2] on the new server, pulling the mails from > the old. 50GB isn't that much as long as your two servers are at least > connected with 100 Mbit to the inet. You may want to block for the time of > the migration via iptables your users accessing Dovecot. However, under the > bottom-line, if this is really necessary depends on you and the needs of > your mailusers/customers. I can't block the whole server. I have to migrate 1 user at once. But I can disable the pop3/imap access for that user, so noone is changing the files during the migration (except for the postfix/exim delivery agent) > P.S. You should think about to use on the new server mdbox as mailbox > format. > That's kinda a hybrid of mbox and maildir and benefits of features of both > its predecessors. However, backup and restoring is in case of mdbox "a bit" > different. Just have a read... > > > [1] http://wiki.dovecot.org/Replication > [2] http://wiki2.dovecot.org/Migration/Dsync Thank you
