Deleted mail reappearing

[Sami Ketola]

> On 1. Sep 2020, at 7.28, John S <johnsutherland at onthelink.net> wrote:
> 
> Recently I upgraded dovecot quite a few major versions. Since then some mailboxes are experiencing deleted mail reappearing. It seems to be happening roughly once a day, but not for every mail client or mailbox, I have at least two clients with this issue: Thunderbird and Outlook.
> 
> Storage is local under two partitions, one as alternative storage.


since you are running mdbox did you run purge before the upgrade?

Sami