I finally took the plunge today and got milter-ahead working. I had been meaning to do something about it for ages, but didn't have a spare redhat machine to test it on. What does it do? The concept behind the milter is very simple. At the start of the SMTP transaction the milter connects with the destination mail server to see if the recipient is valid. If the recipient is … [Read more...] about sendmail milters
MailScanner
SA version check
Julian gave a nice little snippet of perl to check the version of SA from the command line: perl -MMail::SpamAssassin -e 'print $Mail::SpamAssassin::VERSION;' Thanks Julian! … [Read more...] about SA version check
DNSBLs in Postfix
A few weeks ago I started doing some work on geo specific filtering, where email is treated very differently depending on the sending IP. Since implementing this we have been very happy with the results. I also run a UML for my personal usage and for a couple of my pet projects. It's a nice place to try things out. Needless to say the domains hosted on it do get sent a lot of … [Read more...] about DNSBLs in Postfix
Geo specific scoring
For the last couple of months we have been tracking our logs using Vispan with the GeoIP. We can easily see where viruses and spam are coming from and thus draw up a top list of countries. For example, so far this month the top sources of spam have been: United States Korea, Republic of China Ireland United Kingdom NB A percentage of these emails would have been tagged as … [Read more...] about Geo specific scoring
Accurate Statistics
If you are using MailScanner to filter mail you probably want to know how much mail you are filtering and how effective it is, or isn't :mrgreen: There are a number of applications that allow you to get an idea of what is going on: MailWatch - A comprehensive tool that monitors many aspects of your incoming and outgoing mail, as well as offering access to your … [Read more...] about Accurate Statistics