Thomas Berger:
> Hi all,
>
> in our current configuration, we have one postfix system, in front of some
> other mailservers.
>
> We check the recipient address of incoming mails at the first system, and
> could reject the mail there, if send to an unknown user.
> But if the users mailbox is full, we would send backscatter.
That is not a problem if the volume is small enough. Otherwise,
you can set up an access table for over-quota users and use that
table to block mail at the SMTP Port. The access table does not
need to be up-to-date to the minute.
Wietse
