[Discuss] anti-spam.

[Scott Petersen]

On Thu, May 25, 2006 at 12:09:20AM -0700, blackcrow wrote:
> Greetings all.
> 
> I implemented bogofilter with kmail about a year or so ago.  I have 640 emails 
> classified in my "spam" folder.   I still get at least 2 to - 6 spam, 
> fraudulent or phishing emails a day in my inbox.
> 
> There seems to be quite a few systems out there that provide various 
> solutions.  Currently I'm looking at p3scan & exim4-daemon-heavy.  These seem 
> more sophisticated than running a local anti-spam program.  Obviously I'm 
> trying to avoid complicated arrangements that could take me many hours to 
> setup.
> 
> Can anyone offer a little insight to a system(s) that is more effective?
> 

Not sure if you are running your own mail server or not...

I implemented a greylisting spam solution about 5-6 months ago. I
previously had installed spamassassin and a few other filtering tools.
With the filtering only, I was personally getting about 20-40 spam
messages a day of which about 4-10 would make it through the filters.
(This is with a training file of about 1000 spam and 2500 ham messages
and regular re-training.) Once I implemented greylisting this dropped
dramatically. I now get maybe 2-3 spam messages a WEEK and the filters
catch at least 1 or 2 of those. The only downside is that the first time
someone sends you a message it gets delayed by 5 minutes. I have yet to
hear about missing a legitimate message.

My mail server is Postfix and my greylisting tool is Postgrey.

http://www.greylisting.org/

http://en.wikipedia.org/wiki/Greylist

http://isg.ee.ethz.ch/tools/postgrey/

Cheers
Scott Petersen