How do I determine if my ISP is blocking SMTP access.

 
To determine if your ISP is blocking SMTP port:

Open a command prompt by going to "Start" -> "Run" and typing "cmd" or "command" (depending on your version of windows).

At the command prompt, type:

ping mail.yourdomain.com

If that works, then type this:

telnet mail.yourdomain.com 25

If you receive, "connection timed out", then your ISP IS blocking port 25 the SMTP port.

If you receive "220-servername.ez-web-hosting.com", then your OKAY.

If you received "connection timed out" you can try this:

telnet mail.yourdomain.com 26

If you still receive, "connection timed out" you will have to use your ISP's SMTP server.

If you receive "220-servername.ez-web-hosting.com", then you can change the SMTP port in your mail program to port 26 or use your ISP's SMTP server to send mail.

In outlook express to change the SMTP port go to tools > accounts select the account you want to change then click properties. Click the advanced tab you will then see the option to change the SMTP port.
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