henningc@CCC2:~$ telnet smtp.wpi.edu 25
Trying 130.215.36.186...
Connected to smtp.wpi.edu.
Escape character is '^]'.
220 SMTP.WPI.EDU ESMTP Sendmail 8.13.8/8.13.8; Tue, 10 Apr 2007 18:27:16 -0400
mail from:<test@test.com>
250 2.1.0 <test@test.com>... Sender ok
rcpt to:<jackc@wpi.edu>
250 2.1.5 <jackc@wpi.edu>... Recipient ok
data
354 Enter mail, end with "." on a line by itself
Subject: test mail
test mail
.
250 2.0.0 l3AMRGm7028856 Message accepted for delivery
quit
221 2.0.0 SMTP.WPI.EDU closing connection
Connection closed by foreign host.