[Techtalk] Re: filtering spam with spamassassin

[Travis Casey]

Friday, September 12, 2003, 12:09:28 PM, Carla Schroder wrote:
> On Thursday 11 September 2003 9:03 pm, showercurtain wrote:

>> Another problem is configuring postfix to use an rbl database. Will
>> this cause any disruptions with sending and receiving mail?

> No, because it works at the DNS level it is very fast. The blocked messages 
> never hit your server at all. These links might be helpful:

If you're concerned about speed, you might want to set up a caching
nameserver on the machine which is doing the spam filtering.  That
way, if you get 500 spams from the same source, you don't have to wait
for 500 DNS queries and replies across the network -- just the first
one, and then the other 499 are in the local cache.  Most Linux
distributions make setting up a caching nameserver fairly easy --
indeed, some do it by default.

-- 
Travis Casey
efindel at earthlink.net