Random duplicated emails

[Битус Павел]

Hello,

When using a sieve, there is no problem with duplicates, but it is 
impossible to transfer all users to a sieve.

10.09.2019 20:17, Francis via dovecot пишет:
> Le lun. 9 sept. 2019 à 12:08, Francis <francisd at gmail.com 
> <mailto:francisd at gmail.com>> a écrit :
>
>     Hello,
>
>     I migrated our mail infrastructure to Dovecot on Ubuntu 18.04 some
>     months ago. It works fine, but recently some users told me that
>     they sometime receive duplicated emails. Same email content, same
>     headers including message-id.
>
>     I'm using two dovecot servers on two sites. Both server are in
>     cluster. We don't use shared folders. All users that reported this
>     issue so far are using the same server instance. The problematic 
>     emails are coming from local users on that instance too. The
>     examples they given to me was emails with many recipients (To/CC).
>     A specific message can be received twice (or more) by recipient A
>     but only once by recipient B. I didn't see anything in the logs
>     about sieve rules that redirect emails to others recipients.
>
>     Where should I look to diagnostic this issue?
>
>
> Hello,
>
> Thanks for your hints. The message from  Битус Павел in another thread 
> today seem to be similar to my problem. I asked my users if the 
> affected messages are processed by a local rules in Thunderbird and 
> they said yes. I asked them to replaces theirs local rules by sieve 
> rules instead. We'll see if it fixes the problem.
>
> Thanks!
>
> -- 
> Francis
-- 


ROZETKA

Bitus Pavlo
System administrator
rozetka.ua <http://www.rozetka.ua>

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