I have checked and I have relaying turned off and only 6 valid users on the machine, I forced a password change for all accounts. I also used Abuse.Nets relay test to make sure I was not allowing relays. I have no idea how that SPAM got out. Since this machine is a firewall for our office, I tested all internal machines for virus/worms/etc with the latest tools.
So, in the process I looked at all my logs in /var/log I specifically grep'd for the email address that the spam was sent as and to and found no references to it in my logs implying it was not my machine. But I found other things that I dont know how to read.
I googled and found no place for a "how-to read logs and what they mean". In /var/log/messages, I googled for "lame servers" and found that is ok along with a few other items.
in maillog however, I see very few "Relaying denied" messages (I expected more of them) and a lot of "lost input" messages that from googling appears to be a spammer that got blocked and ok (is that true?). In every case where a "lost input" was I could find 2 lines, one for the "from" and one for lost input with the matching "sendmail[xxxx]" number.
But lines like these 2 below did NOT have matching lines, does this mean they got sent ? relayed thru my machine somehow ? I could not find a fail or sent line for many lines like the ones below.
Apr 21 12:25:00 mail sendmail[1067]: MAA01067: from=<postmaster@xxxxxxxxxxxxxxxxxxxxxxxx>, size=1657, class=0, pri=0
, nrcpts=0, proto=ESMTP, relay=[200.213.72.130]
Apr 21 12:29:03 mail sendmail[1214]: MAA01214: from=<>, size=0, class=0, pri=0, nrcpts=0, proto=SMTP, relay=fw1-81-80-126-2.bplc.fr [81.80.126.2]
Where do I learn to read the various logs on Fedora/Linux ? If I missed a google what should have I googled for ?
mike
