At Least 2 or 3 times a year I have to test email via a telnet session. You’d think I’d remember the commands, but I’m getting old and keep forgetting 🙂
I want to document them here to make it easy for me to come back to find.
Telnet mail.server.com 25
mail from: email@example.com
rcpt to: firstname.lastname@example.org
subject: put something here
<type message body>
Remember you can’t use the backspace when entering the first 3 commands.
Also if you get errors with the mail from or mail to you may have a mail relay issue.
If you need screenshots or more details check out wikihow
Here are some helpful post on setting up delegation on print servers, this includes some powershell scripts to help.