If the greeting was successful, you should see the server's list of options:įrom here you should be able to send a quick test message to make sure the server works. It is used by the mail server to determine where the email message is coming from, although the server has no way of verifying it. This should give you your mail server's greeting, such as:įrom there on, you need to introduce yourself via the helo or ehlo command: ehlo ĭon't worry too much about your hostname. Assuming your mail server's FQDN is : telnet 25 If you make a mistake, your best bet is to just hit enter and re-type in the command. Keep in mind that backspace (<-) does not play well with Telnet. # then hit Enter for a new line, type in "." (dot) and hit Enter againĬonnect to Telnet in to your mail server on port 25 (SMTP). tl drįrom command line/shell in any OS that has Telnet feature installed: telnet 25 #this is your mail serverĮhlo hostname.local #this is your computer's hostname, try to use a FQDN if you have one ProblemYou have configured an outgoing email server, and you want to make sure it's working correctly.
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