Welcome to martijnjongen.com, the home of 'ORFilter spam blocker' for Microsoft Exchange Server 2000 /2003 and Microsoft SMTP server (on Windows 2000 / 2003 or XP). (Exchange Anti-Spam)

I created a solution for the growing number of spam e-mail that your users are receiving everyday. If you use Microsoft Windows 200x / XP SMTP Service or Microsoft Exchange 200x Server, this is the thing to get!

What is it? It's an Open Relay Filter (ORFilter), a DNS blacklist (DNSBL, RBL, SURBL) based filter for Windows 2000 / 2003 or Exchange 2000 /2003 (no, not for Exchange 5.5) servers that blocks unsolicited bulk e-mails.

Try ORFilter and block the spam you receive! The best thing - it's completely free, both for personal and commercial use. There are no catches, no nothing. This because I believe that together we can fight spam. (you might want to click on my sponsors on the right to help me keep this site running)