LMTP error on trying to find passwd-file for Postfix recipient validation

[Bernardo Reino]

On Fri, 28 Jan 2022, Narcis Garcia wrote:

> Hello everyone,
>
> I have following configurations (and more) at /etc/dovecot/local.conf in a 
> "/VirtualUserFlatFilesPostfix/" setup :
>
> [partial file content begins]

[snip]

> When incoming mail goes to a mailbox that does not exist, an error is logged 
> by Dovecot, letter remains at Postfix queue, and no rejection message to 
> sender (here host is /mail.example.net/):

Wouldn't it make sense to prevent postfix from attempting to deliver (via LMTP) 
messages addressed to invalid users?

i.e. using virtual_mailbox_maps and/or virtual_alias_maps, as needed.

> [partial]$ cat /var/log/dovecot.log
>
> 2022-01-28 08:52:00 lmtp(1883): Info: Connect from local
> 2022-01-28 08:52:00 auth: Error: passwd-file(wronguser at example.net): 
> stat(/srv/vmail/domains.d/example.net/users.d/wronguser/etc/passwd) failed: 
> Address family not supported by protocol

^^^ weird message, but maybe it's dovecot's way of saying "file not found" :)

Good luck.