Server migration

[Gandalf Corvotempesta]

2016-10-26 8:57 GMT+02:00 Aki Tuomi <aki.tuomi at dovecot.fi>:
> If you are moving from 1.x to 2.x, I think you should make some trials
> first, and preferably move the user one at a time, blocking access to
> old server/new server during move. It is very forklift upgrade, much danger.

Yes, I'll do some test migration before moving the whole server.
Maildir structure isn't changed between 1.x and 2.x, thus all emails
should be safe.
I have to test the new 2.2 configuration to see if existing users are
able to log-in but how
can I test if existing client would be able to preserve the mail ids
without downloading everything again?