If you use any type of firewall, you may need to add the ports that are needed to send and receive email using a POP3 email program such as Outlook, Outlook Express, Windows Mail or any other third party email program. This example explains how to grant access to the ports if you are using Windows Firewall.   If you use some other firewall (ie: Mcafee Firewall) you will need to follow the instructions set by the software provider to add these new ports.

First of all, go to Control Panel and click on Windows Firewall. Click on 'Allow a program through Windows Firewall'.

Under 'Windows Firewall Settings', click on 'Add port'

You will get the Add a Port window. Add the first port number; for 'Name' enter 'smpop3'  for 'Port number' enter '65515' (without quotes) just as shown below.

Click OK, then click again on 'Add port' to add the second port number; for 'Name' enter 'smsmtp'  for 'Port number' enter '65535' (without quotes) just as shown below.

Click OK and exit normally. You should now be able to send and receive email without your firewall blocking access using Outlook, Outlook Express, Windows Mail or any other popular POP3 email program.