Frank Brendel:
> > You really should do something about that, build a table of over-
> > quota
> > recipients, and tempfail new mail for such users when briefly over
> > quota, and ultimately reject if long-term over-quota.
> >
> but is that possible with remote mailboxes?
The Postfix reject_unverified_recipient feature can block mail for
unavailable remote and local mailboxes. This feature is typically
used to avoid forwarding mail for a non-existing address, but it
will work with all error conditions that a Postfix delivery agent
can detect without actually delivering mail.
Wietse
