Here are simple steps on how to send an email using telnet. This a great way to test your mail server configuration such as exim, sendmail or postfix without a need for a email client. First telnet to yor mail server:
$ telnet mail.mymailserver.com 25
Use HELO command to tell mail server from which domain you are coming from:
Now we need to state from which address this email will be sent. This is done with MAIL FROM: command:
Next step is to specify recipient with RCPT TO:. Use RCPT TO: multiple times if you would like to send your email to multiple email addresses.
Now we ca star writing some subject and body. To do that we need to use DATA command. First type DATA followed by Subject: and body. Once done enter . to send email to be queued.
DATA Subject: Sending an email using telnet Hello, Here is my body? Do you like it? cheers .
Do not forget "." at the end of the message. To quit type