I have been hacked (WAS: Have I been hacked or is nmap wrong?)

[Crispy Beef]

> Also, I said smtp ports were open on the machines in question, I just verified 
> that I can send emails via BOTH these systems even though no 
> sendmail/exim/whatever was ever installed by me and sendmail_enable="None" on 
> both.

For what it's worth, to disable senmail on 5.0 and later, you need:

sendmail_enable="NO"
sendmail_submit_enable="NO"
sendmail_outbound_enable="NO"
sendmail_msp_queue_enable="NO"

All those lines need to go in your /etc/rc.conf file, just the top line on 
it's own will only stop mail coming into your system and I think it has to be 
"NO" not "None", but I'm not 100% on that.

The above is from the Handbook:

http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/mail-changingmta.html

--
Paul