Author: Duncan B. Date: To: Hampshire LUG Discussion List Subject: Re: [Hampshire] Spamassassin shortcircuiting
Hi again,
> Are you immediately rejecting email to unknown local users/domain?
> If not then that will be putting a massive load on your spamds as
> well as possibly making you a source of backscatter bounces...
Sendmail will reject to unknown domains immediately, but not users as
it's a relaying server for a number of client domains, so has no way
to tell if a user exists without scanning/sending first :(
> 10 seconds per email seems excessive. The worst I have seen is
> around 5 seconds on an adequately specced machine with a default
> spamassassin configuration. That's why I suggested maybe looking to
> see if it is running out of RAM. Other things that spring to mind
> are DCC, Razor and Pyzor tests that perhaps are failing to connect
> to their respective servers.
I'm only using Razor, but I think this is probably having a big impact on
performance... it does catch a lot of spam though! I will put dnscache on
each machine and see how it goes from there...