Port 25 (or 5125) - smtp.bluetie.com

Windows:
1.) Click on the Start menu
2.) Click on Run
3.) Type: cmd (Windows 98 users should type command)
4.) Press Enter
5.) In the DOS window type: telnet smtp.bluetie.com 25 (substitute 5125 if that's what's being used)
6.) Press Enter
7.) If connected to the port the server will respond with something similar to: 220 emta1.app.nyc1.bluetie.com BlueTie EMTA Server
8.) If the server does not respond, please contact system administrator to open the port

Macintosh (OS X+):
1.) Open the Local disk directory
2.) Open the Applications directory
3.) Open the Utilities directory
4.) Open the Terminal application
5.) In the Terminal window type: telnet smtp.bluetie.com 25 (substitute 5125 if that's what's being used)
6.) Press Enter
7.) If connected to the port the server will respond with something similar to: 220 emta1.app.nyc1.bluetie.com BlueTie EMTA Server
8.) If the server does not respond, please contact system administrator to open the port