search for: 1cd6f785

...nderbird 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 -------------- next part -------------- An HTML attachment was scrubbed... URL: <https://dovecot.org/pipermail/dovecot/attachments/20190910/1cd6f785/attachment-0001.html>

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