Email Spam Filtering Next Level

Email Spam Filtering Next Level

Spamhaus http://www.spamhaus.org/ has the limit to the DNS queries for email server. This limition hit our email server. Yep we received so much spam the we hit the spamhaus limitation.

http://www.spamhaus.org/organization/dnsblusage.html

We decided to try two methods to increase the efectiveness of our SPAM filtering.

(1) SQLgrey

http://sqlgrey.sourceforge.net/

We are using postfix, by putting software like SQLgrey it will help to decrease the numbers of spam that enter into Mailscanner.

(2) Clamav

http://www.sanesecurity.com/clamav/

The site above provide clamav signatures that will scan for spam in email including inside PDF files.

and now to choose between MailScanner that used Spamassassin and DSPAM.

MailScanner
http://www.mailscanner.info/

Spamassassin
http://spamassassin.apache.org/
DSPAM
http://dspam.nuclearelephant.com/

or we just build our own DNSBL :)

http://spamikaze.org/