[Mimedefang] RBL and DNS lookups

[Daniel Aquino]

>
> Admittedly, I am biased as a supporter of both SpamAssassin and RBLs.  But I
> have to say that SA's strength lies in the fact that it is a scoring
> framework that allows many other tests to be put into the same pool.
>

Why are you a non supporter of SpamAssassin?

And to re-focus my question...
Constant DNS lookups inject high amounts of latency and system overhead ?