When troubleshooting SMTP email issues it is oftentimes handy to send a test email directly from Windows in order to narrow down the part of the system with the problem.
Simple way to test SMTP email for testing purposes.
- Make sure telnet is turned ON in windows. (if not, go to control panel>>programs>>turn windows features on or off and turn ON the telnet client.
- Open a command prompt and type telnet domain name (or IP address) and port. EXAMPLE telnet 10.169.9.10 25)
- Type HELO and identify the sending system, EXAMPLE: helo MyPCName
- Type mail from: followed by an email address. EXAMPLE: mail from: firstname.lastname@example.org
- Type rcpt to: followed by destination address. EXAMPLE: rcpt to: AMeran@3indq.com (NOTE: must be an email account in the mail server)
- Type data then ENTER key
- Type a message
- Type . (period) then ENTER to end
NOTE: Type slowly and if you mistype something hit enter and after the error re-type the line. Using backup space appears to work but it doesn't.
1. Make sure Telnet server is installed on the SMTP server.
2. Make sure Telnet service is enabled/running on the SMTP server