Telnet mail server send email

Below is some instruction on how to testing your mail server using the telnet command. I found this is useful while you do some debugging on the mail server to send out email to others.

1. Open a Command Prompt window
   
2. Telnet to your mail server. Normally the port will be 110(Pop3) and 2

   telnet [yourmailserver] [port]

   
   
3. Following is the example to connect SMTP server & try to send out email. Once successful telnet into your mail server, execute it (Red will be the command & the green is the reply). For the auth login command c2S2AxFuZHk= is user name (base 64 encoded) and the b2Y8IOdhdGE= is password (base 64 encoded) . You can encode your user name & password here.

   
   auth login
   334 VXNlcm5hbWU6
   c2S2AxFuZHk=
   334 UGFzc3dvcmQ6
   b2Y8IOdhdGE=
   235 2.7.0 Authentication successful.
   mail from: [SENDER EMAIL ADDRESS]
   250 2.1.0 [SENDER EMAIL ADDRESS]....Sender OK
   rcpt to: [RECEIPIENT EMAIL ADDRESS]
   250 2.1.5  [RECEIPIENT EMAIL ADDRESS]
   data
   354 Start mail input; end with .
   subject:testing
   testing email from XXXXXX
   .250 2.6.0 Queued mail for delivery
   
   quit