[Mimedefang] limiting SA's RBL timeouts

[Gary Funck]

> -----Original Message-----
> From: Joseph Brennan
> Sent: Thursday, January 12, 2006 6:41 AM
> 
> You could have Mimedefang do those lookups instead, early in the
> process.  If you will reject for being in certain RBLs then you can
> dispose of those messages without running the SA stuff.
> 
> Also, I think Spamassassin looks up all the IPs in the headers,
> while Mimedefang can test just the IP relaying the mail.  In my
> opinion this is more accurate as well as more efficient.

On the latter point first, I don't think SA looks at all IP's in
the headers.  Using the trusted_networks configuration parameters,
you can tell it whhich Received lines it can trust.  It will then
check the incoming IP's on those lines, but I don't recall whether it
does RBL checking on those lines by default.  SA also does RBL checking
on IP addresses derived from URL's in the message body, which is
something that would be quite a bit of work for MdF.

We do use RBL's via sendmail's access list, using a program called
spfilter to build up those access lists from known user-selectable
RBL's sources.  It works well.

   - Gary