It’s not easy running your own IT things – but it’s easy to come in trouble with and waste hours. Trust me, I know that from my own experience, especially dealing with MTA systems. Here it is Postfix.

The number of mails rushing through my system is often more than 800 mails a day. The reason for such a high number may include spam traffic. To combat spam, I installed Spamassassin. If you do not want to waste hours searching for the reason why so many spam mails are not blocked, have a look at your firewall settings first. Spamassassin uses Razor, Pyzor, DCC and other distributed Services. If those ports are closed, no info from that systems may be gathered…