Telnet mail server send email

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

source: myhow2guru