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 z19sm6017985wmi.7 - gsmtp    HELP    214 2.0.0 https://www.google.com/search? btnI&q=RFC+5321 z19sm6017985wmi.7 - gsmtp