[root@gnstage1 bin]# telnet localhost 25
Trying 127.0.0.1...
Connected to localhost.localdomain (127.0.0.1).
Escape character is '^]'.
220 gnmail5.gaggle.net ESMTP
ehlo gaggle.net
250-gnmail5.gaggle.net
250-AUTH LOGIN CRAM-MD5 PLAIN
250-AUTH=LOGIN CRAM-MD5 PLAIN
250-PIPELINING
250 8BITMIME
mail from: justinc@gaggle.net
250 ok
rcpt to: justin.crowley@gmail.com
553 sorry, that domain isn't in my list of allowed rcpthosts (#5.7.1)
quit