I read that you can connect to an SMTP server (like gmail, hotmail, etc) via telnet, and manually put in commands to send anonymous email (or even worse, send email with a false "from" address). Is this still possible? (I'm receiving many emails from dubious addresses.)
Manual SMTP with anonymous sender
emailsmtp
Best Answer
As Wes said, it's possible, depends of the server's level of security. Below is a classic telnet sequence against a SMTP server :