[CentOS] spam control
Bill.Baird at phoenixmi.com
Wed Oct 25 14:26:01 UTC 2006
> > I have found that greylisting based on the Spamhaus sbl-xbl list
> > massively reduces spam. Setting that up on my backup MX
> resulted in
> > all traffic through it stopping when my primary MX is up.
> Are you using greylisting or blacklisting with Spamhaus? My
> understanding of blacklisting is that blacklisting uses a DNS
> blacklist, such as Spamhaus. My understanding of greylisting
> is when your MTA sends back a temporary failure the first
> time in X number of days where it sees a new
> sender/receiver/mail server IP address triplicate. Please clarify.
I believe he means that he is only greylisting incoming email when the server is listed in spamhaus. All other mail comes through without being greylisted (resulting in normal delivery times)
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