Curtis:
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> I guess this has been discussed a time or two already, but, as of yet,
> I haven't found anyone that has found a real solution. ?We need the
> ability to have around 1000 domains per physical server, while
> allowing each domain to maintain their own sender blacklist (using the
> sender's email address, not IP address).
>
> While I realize that this can be done with
> smtpd_recipient_restriction, but, on hosts with lots of domains, you
> end up with a lot of open files (e.g.
> http://tech.groups.yahoo.com/group/postfix-users/message/241874 ).
>
> So... my thought is that a policy server is the answer. However, I
> can't seem to find a policy server that supports sender blacklisting
> which is written in C (I'm concerned that anything else wouldn't be
> fast enough).
A policy daemon does very little work: split the query from Postfix,
and query some DBMS. Most of the work is done outside of the policy
daemon.
Also. note that Postfix reuses the policy daemon process many times.
On a busy server, the overhead of script compilation is amortized
over up to 100 SMTP client connections.
Wietse
> I'm ready to concede that the solution I'm looking for does not exist,
> but I just thought I'd check... just in case something new has come on
> the scene (either with Postfix or with policy servers) since the last
> time this was discussed.
>
> Thanks,
>
> Curtis
>
>
