How to check if outgoing mail server is blocked by your ISP

Type the following command:
telnet 25

View Results:
If Port 25 is not blocked, you will get a successful 220 response (text may vary).
Connected to
Escape character is '^]'.
220 ESMTP Exim 4.63 Tue, 24 Jun 2008 13:45:04 -0700

If Port 25 is blocked, you will get a connection error or no response at all.
telnet: connect to address Connection refused
telnet: Unable to connect to remote host

Was this answer helpful?

 Print this Article

Also Read

Setting Up Email for the Apple iPhone

Follow these step-by-step instructions to set up your Email account on your iPhone: 1. Select...

How to configure e-mail filtering in cPanel

You can use e-mail filters to block unwanted messages based upon a certain set of conditions. For...

Zoho MX Records

General Instructions to change the MX records Follow these steps to change your domain's MX...

How to Create an Auto Responder

This tutorial will teach you how to create an auto responder. You can use auto responders to...

How to Setup Outlook 2003

Note: Outlook 2010 is exactly the same as other versions of Outlook, but finding the settings is...

Our official partners