Ugo's Blog

Hi, I have tried FSL 's BarricadeMX software at two of my client's site. This piece of software is a giant step in the battle against spam. What is it? It is an SMTP proxy, which does many, many tests during the SMTP transaction in a very efficient way. If one test fails, it rejects the message with a 5xx SMTP reply, so the sender should be notified. Il also implements Greylisting in a more intelligent manner than most current Greylisting implementations. I installed and configured it for 2 clients which are in a different situation: One is a high-volume, multiple servers setup, and the other is a smaller setup with only 1 scanning server. On the big setup, it allowed this client to stop the delays they were experiencing and the spam-catching rate is a lot higher. It also simplfied management. On the smaller setup, I enabled BarricadeMX's clamd and spamd support. This way, viruses are blocked at the MTA level, and any spam that scores over a defined parameter. In t...

I strongly recommend this good anti-spam service for anyone who has its own domain: www.lastspam.com

Hi, A few words on milter-greylist , especially because the new version (3) is now RC6 and looks pretty stable. What are the features of milter-greylist? Per-domain and per-user settings. Friendly networks whitelisting Multi-MX sync (database is replicated many mail servers if needed) SMTP-AUTH support SPF records: can be configured not to impose GreyListing to messages that are SPF-compliant Access lists with DNSbls This last option is new in version 3. It is very nice: it allows one to configure milter-greylist to impose GreyListing if the source IP is on (configurable) DNS black lists (DNSbls). I've installed it and it decreased the number of messages/day by about 60%. I only had to whitelist one server.

http://www.msrbl.com/ Looks promising.

This is just a quick post to encourage people to try SnertSoft's excellent anti-spam milters. If you're running a spam-filtering gateway, you may want to try milter-ahead. It checks at the backend mail server if the user exists before accepting the message. Milter-sender is also very interesting, it checks for the existence of the sender's e-mail before accepting the message. Milter-link checks for URL in message bodies againsts URI blacklists. And this one is free! (most are). All the milters' descriptions are here . Anthony, the author, is very kind and offers good support. Have a look at his website . There are many other milters that may help you reduce the load on your spam-filtering system and reduce the number of spams that make it to your user's mailbox!