Secure my mail server

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Posted by Zaggs, 10-16-2009, 12:37 PM
Hi Guys, I want to create a really secure mail server (if there is such a thing these days). I want to reduce any spam coming into my server and I also want to create a good relationship with other servers so that any email sent from my server is not classed as spam. How can I achieve this? Here is my current system setup: Ubuntu 9.04 (jaunty) Mail: Postfix Control Panel: ISPConfig Tutorials, links & suggestions all welcome
Posted by Motiv, 10-16-2009, 01:14 PM
http://www.google.com/#hl=en&source=...2755c6b3e9b2e9
Posted by Jeremy, 10-16-2009, 02:07 PM
Having a proxy in front of the mail server is the best i find in any solution. Firewall the server to only receive and send email to that proxy alone.
Posted by Zaggs, 10-16-2009, 03:41 PM
Are there any tutorials or guides how to do this?
Posted by activelobby4u, 10-16-2009, 04:57 PM
the basic steps are 1. Have RDNS, spf , domainkeys 2. enable rbl 3. Keep an updated spam assassin
Posted by Zaggs, 10-17-2009, 06:39 AM
Hi, I am in the process of setting up SpamAssassin on the server. I have installed it and I am currently learning how to "train" it. I have found the following commands to train the system: Questions: 1) How do I create the spam & ham directories? 2) How do I get SpamAssassin to filter spam into these directories? I can't get my head round this. Please if someone could shed some light on this it would be great! Thanks!
Posted by Jeremy, 10-20-2009, 03:00 PM
I dont use ISPconfig (yet lol...) but i would check /home/user/mail(something/emailaddress/some/dir It might be in there. As for the proxy stuff/smarthost you can check out http://www.global-domination.org/ESVA.php or pick up a third party. You can use google to send your emails as well. To run the link above you'll need to run VMware...
Posted by inspiron, 10-21-2009, 07:58 AM
You can get installed the csf/apf firewall on the server to block the spammers IP address and can check the mail logs on the server to trace the spammers.
Posted by TDS-chriss, 10-21-2009, 03:18 PM
Postgrey in combination with your postfix is a excellent deflector of those one time hit-and-run spammers.