~$ host me.com
me.com has address 17.146.233.10
me.com mail is handled by 10 mx3.me.com.akadns.net.
me.com mail is handled by 10 mx4.me.com.akadns.net.
me.com mail is handled by 10 mx5.me.com.akadns.net.
me.com mail is handled by 10 mx2.me.com.akadns.net.
me.com mail is handled by 10 mx6.me.com.akadns.net.
me.com mail is handled by 10 mx1.me.com.akadns.net.
~$ telnet mx3.me.com.akadns.net 25
Trying 17.158.8.61...
Connected to mx3.me.com.akadns.net.
Escape character is '^]'.
220 nk11p00mm-smtpin132.mac.com -- Server ESMTP (Oracle Communications Messaging Server 7u4-23.01(7.0.4.23.0) 64bit (built Aug 10 2011))
HELO local.domain.name
250 nk11p00mm-smtpin132.mac.com OK, [x.x.x.x].
QUIT
221 2.3.0 Bye received. Goodbye.
Connection closed by foreign host.