[lug] linuxconf and sendmail config

[dan radom]

saturn:~$ telnet radom.org 25
Trying 24.255.187.190...
Connected to radom.org.
Escape character is '^]'.
220 mars.radom.org ESMTP Sendmail 8.11.2/8.11.2; Mon, 8 Oct 2001 17:17:27 -0600
helo radom.org
250 mars.radom.org Hello host84-212.birch.net [216.212.84.212], pleased to meet      
you
mail From:  me at me.org
250 2.1.0 me at me.org... Sender ok
rcpt to: dradom at redback.com
550 5.7.1 dradom at redback.com... Relaying denied


> Can somebody here tell me if there is a simple way to test for mail
> relay from another ip address, via something like telnet to port 25? Is
> there a simple command line I could use? If so, we could arrange to help
> test each other's machine in private. My saving grace here, even if
> sendmail is lying and doing relay, is that it is completely blocked to
> everywhere but the one ip from my ISP.