Use Telnet Command to check email connection
Posted by PremiumReseller.com on 27 September 2009 02:23 PM
1. Telnet to port 25 of your target SMTP server.
Open command prompt windows and type
C:\telnet mail.YourDomain.com 25
Connecting To mail.YourDomain.com..._
Mail server will respond with successful message
Connected to mail.yourdomain.com .
2. To check POP3 connection, Open command prompt windows and telnet port 110
C:\telnet mail.yourdomain.com 110
Connecting To mail.yourdomain.com...
The server should respond with a generic welcome message.
Connected to mail.yourdomain.com
Note: Telnet is not installed on Windows Vista by default. To solve this problem, go to Control Panel, then Programs, then under Program and Features select Turn Windows Features On/Off, then scroll down and click to select the Telnet Client.