Restoring mailboxes from backup duplicates messages in POP clients

[@lbutlr]

On 10 Apr 2019, at 08:59, Tanstaafl via dovecot <dovecot at dovecot.org> wrote:
> On Wed Apr 10 2019 09:13:41 GMT-0400 (Eastern Standard Time), Luis F. V.
> Gomes via dovecot <dovecot at dovecot.org> wrote:
>> I had a disk problem and had to reformat it. All mailboxes were backed 
>> up using rsync.
>> After I restored the mailboxes, the POP clients (Thunderbird) that 
>> were configured to leave the messages on the mailserver for, let's 
>> say, 30 days, didn't understand that some messages were already 
>> transfered and the users got duplicated messages in their Inbox.
>> How can we avoid this?
> 
> Don't use rsync, use the built in dovecot backup capability?

Also, don't use POP3?


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