[SASAG] spam filtering

[Chris Wilkes]

I'll second greylisting.  Short description: the first time an IP address
tries to send email through your server send back a 'try again later on'
message, after 5 minutes they are allowed in.

Just that caused my spam to reduce by 90% as most spam programs don't
bother trying to send email a 2nd time.  If they do, and my bayesian
spam filter (I use http://bogofilter.org) catches it I'll remove their
greylisted IP address so they'll have to go through that step again.  If
it continues I'll put them in my own local RBL.

I can do that as it is just my own personal mail server, but it did work
well for a previous company.  Course with that you have a lot of control
over your own users, I'm sure with an ISP it will be different (ie "what
do you mean I can't get mortgage applications from Korea!?")

Chris


On Tue, Jun 13, 2006 at 10:50:56AM -0700, Ed Mulligan wrote:
> Haychoi recently implemented greylisting on our mail server, and I must 
> admit to being really pleased with the results ... just a couple spam per 
> day now ... and very little overhead on our side of things too.
> 
> -ejm
> 
>   On Tue, 13 Jun 2006, Eric Kahklen wrote:
> 
> > I am looking for suggestions on what people have found useful in
> > decreasing their incoming spam.  I've implemented a number of options in
> > Postfix which helps a little, but I need to get a little more agressive
> > without deleting legitimate email.  Free software is ideal, but if it
> > costs money that is fine too especially if its less time to configure
> > and manage.
> >
> > Thanks,
> > Eric
> >
> > _______________________________________________
> > Members mailing list
> > Members at lists.seattle-sage.org
> > http://lists.seattle-sage.org/mailman/listinfo/members
> >
> _______________________________________________
> Members mailing list
> Members at lists.seattle-sage.org
> http://lists.seattle-sage.org/mailman/listinfo/members