How to check what is clogging up mail services - CentOS 5
 

I am having some mail failures, and can't pin point what to look for. Should I be using netstat -an, and seeing what is open, and closed?

Also I am using Qmail as the Primary MTA.

Since I am using Qmail, I was going to implement SPAMDyke. Any one have any problems with SPAMDyke, and is it a good Open Source solution?

Thank you!

What do you mean by mail failures ?

Is this mail you are sending, or mail that you should be receiving ?

What is the exact error message you receive on those messages when they bounce ?

Sorry for not explaining better. My mail service seems to go up, and down, or better put, my mail service seems to be bogged down by spam? How would I check the Qmail logs?

your qmail log files should be located at /var/log/qmail/current and /var/log/qmail/smtpd/current

are you using any DNS blackliststs ? thats one of the first things I would implement..
http://www.greens.org/about/software/dnsbl.shtml

Can't tell you much about configuring qmail for anti-spam.. it's not as easy to create filters for qmail as it is for Postfix or Exim, since most qmail addon's require patching of the qmail binary..
you can use mailfront and plugins to add some functionality without having to patch qmail.. http://untroubled.org/mailfront/

Thanks for the info! I am going to implement the mail front solution!