Randy Ramsdell:
> We simply alias
>
> $user $u...@$othermailserver
>
> The $users we forward to are known by our mail server and no mail will
> forward otherwise. I cannot think of a scenario which rejected mail from
> $othermailserver would be anything other than UCE in this case. The
> fringe issues would be a borked config which reject because of
> misconfiguration on their end which would result is lost mail if we drop
> all rejects from $othermailserver.
>
> What scenarios could occur which would make dropping these rejects a bad
> idea?
Spamfilters are imperfect and will have false rejects (either that,
or they would pass all spam).
This means you would be dropping legitimate mail into the bit bucket.
A better approach is that the down-stream system not reject mail,
instead provide a quarantine service.
Wietse