Panic: Module context expire_mail_user_module missing (Debian 10)

[Alexander Dalloz]

Am 2019-08-02 10:46, schrieb Thomas Krause via dovecot:
> Am 2019-08-02 10:39, schrieb Alexander Dalloz via dovecot:
>> Am 2019-08-02 10:31, schrieb Thomas Krause via dovecot:
>>> Hi all,
>>> I tried to migrate a mailserver from Debian 9 (Dovecot 2.2.27) to
>>> Debian 10 (Dovecot 2.3.4.1). I moved the mail-partition and
>>> /etc/dovecot from the old to the new server. Dovecot started with
>>> 2 warnings. When trying to fetch mails via pop3 the server crashes:
>>> 
>>> 
>>> Aug  1 16:56:47 mail19 dovecot: pop3-login: Login: user=<testuser>,
>>> rip=::1, mpid=22394, session=<rutwcw+PRp4AAAAAAAAAAAAAAAAAAAAB>
>>> Aug  1 16:56:47 mail19 dovecot:
>>> pop3(testuser)<22394><rutwcw+PRp4AAAAAAAAAAAAAAAAAAAAB>: Panic: 
>>> Module
>>> context expire_mail_user_module missing
>> 
>> Disable the expire plugin in your configuration.
>> 
> After disabling the expire module it works. But I need the expire
> module. What can I do?
> 
> Regards,
> Thomas.

Then please provide your "doveconf -n" output including your previous 
expire plugin usage.

Alexander