On Sep 26, 2019, at 1:29 PM, David Wells - Alfavinil S.A.
> wrote:
>> and as dovecot has the option "allow_all_users=yes”
> Simple, don’t do that.
>
> Somewhere in your chain something has to validate the users, otherwise yes,
> everything will be accepted because that is what you told the system to do.
>
>
Good afternoon.
Dovecot is relaying mails to users that do not exist in the
virtual_mailbox_maps to the dovecot lmtp. I'm using dovecot's lmtp to
deliver mails for a virtual domain. The relevant postfix conf is as follows
> virtual_alias_maps = hash:/etc/postfix/virtual
> virtual_mailbox_domains =
