RE: [exim] Reducing load vs seeing all the spam

> Hi, I use similar order on the ACL's and just 2 weeks ago I
> moved the RBL checks to the "connect" ACL instead of the
> "RCPT" ACL. This little change, speed up my servers and
> reduce the load from 3 to 0.5
>
> After thinking about it, is obvius that if we filter by IP,
> i.e. using RBL, why not filter at the connection time if we
> just need the IP info and nothing more? That way we don't do
> checks that are expensive and not necesary.
>

Because there might be some senders you need to whitelist who would fail the
RBL checks, and because you should always accept mail to postmaster
regardless of its origin.