How to test your mail server SMTP communication with Telnet

SMTP without Authentication

In the below example lines starting with the number 220, 221, 250 and 354 are the responses.

 

SMTP with Authentication

This example is quite the same as the above one only it implements authentication.

 

 

Here a handy tool to encode or decode your data to base64.
http://ostermiller.org/calc/encode.html (Zip)

And remember kids, don’t spam 😉