Pages

Monday, September 20, 2010

How to check if port 25 is open?

If you get an error that your mail server is not found/not responding, and everything else on your email client is configured properly, most likely the problem is due to blocking on port 25 by your ISP.

If you are using Microsoft Windows:
1) Click the Start Menu button.
2) Click Run.
3) Type:
"cmd" (without the quotes) and press the Enter button.
4) When the command prompt appears, type the following:
"telnet yourdomain.com 25" (without the quotes) and press the Enter button.

If you are using Linux or MAC, just open a console and type "telnet yourdomain.com 25" (without the quotes) and press the Enter button.

In both cases described above, you must see a welcome message, which states that you are connected to an SMTP server.

No comments:

Post a Comment