Hmm, I must have something compiled wrong with sendmail then:
eyelab:~# telnet eyelab 25
Trying 35.8.64.179...
Connected to eyelab.psy.msu.edu.
Escape character is '^]'.
220-eyelab.psy.msu.edu Sendmail 8.6.12/8.6.9 ready at Wed, 29 May 1996 09:30:42
-0400
220 ESMTP spoken here
500 Command unrecognized
quit
221 eyelab.psy.msu.edu closing connection
Connection closed by foreign host.
eyelab:~# cat /etc/motd
Linux 1.99.7. (POSIX).
You have new mail in /var/spool/mail/root
The only problem I've had with sendmail is that every now and then it seems
to decide not to remove things from /var/spool/mqueue (or actually it's probably
the program that does the mail delivery), which tends to result in people
getting multiple copies of their mail.
Gary Schrock
root@eyelab.msu.edu