I was informed yesterday by a fairly creditable source that my email server had sent 30000 messages last month. This is alot more that i expected possibly someone, somehow may be using me for a relay. I promptly checked the zimba dashboard but it does not give as exact informations as i would like. Is there another way to track and check the zimbra stats?

I am pretty sure that some spam was slipping through my backup mx, a none Zimbra, postfix server on a FreeBSD box. I have since shut it down until i can figure out what is going on.

I also checked the RBL lists and of course i am on the top three. I went to the spews site and discovered that my whole ip block is listed i think. Would this be something i can fix or does my ISP have to take care of it, how do i find out?

l1.spews.dnsbl.sorbs.net http://l1.spews.dnsbl.sorbs.net l1.spews.dnsbl.sorbs.net LISTED
l2.spews.dnsbl.sorbs.net http://l2.spews.dnsbl.sorbs.net l2.spews.dnsbl.sorbs.net LISTED
spews.dnsbl.net.au http://spews.dnsbl.net.au spews.dnsbl.net.au LISTED