telnet 127.0.0.1 1234 Trying 127.0.0.1... Connected to 127.0.0.1. Escape character is '^]'. 220 smtp.gmail.com ESMTP x20sm3297437wrg.52 - gsmtp    HELP    214 2.0.0 https://www.google.com/search?btnI=RFC+5321 x20sm3297437wrg.52 - gsmtp    QUIT    221 2.0.0 closing connection x20sm3297437wrg.52 - gsmtp Connection closed by foreign host.