Hi, my first post - please be gentle.
Have a firewall runing a sendmail forwarder - RH8.0 going off to a Exchange 5.5 machine.
We seem to get alot of spam, I am using the /etc/mail/access file to block names and addresses I can resolve, however there are some barstards who seem to be able send mail to our whole network and they do it by sending it to:
Now I know their doing it by telneting on 25 to our address and all the info is displayed for them.
This is what they see when they
telnet 203.xxx.60.1x6 25
Connected to 203.xxx.60.1x6.
Escape character is '^]'.
220 ns2.xxxxxxxxxxx.com.au ESMTP Sendmail 8.12.8/8.12.8; Fri, 25 Jul 2003 22:15:41 +1000
How do I block this out? I have fiddled with the Masquade thingys in the /etc/mail/sendmail.mc
What's better....sendmail ot postfix?