The popup blocker is a brower function. You need to check it to find out the blocking level and adjust it.
If it is set to High it will see some mail functions as popups.
You can also add exceptions to the popup blocker.
If you are using the Internet Explorer pop up blocker included with Service Pack 2 or Service Pack 3 these instructions work with IE6, IE7, IE8, IE9, and IE10.
Go to Tools at the top of this page.
Internet Options/Privacy tab.
Click on Settings in Pop-up Blocker.
Add the following to the Allow line:
Close out Internet Options..
If you use a different blocker, just look on the bottom of the page to see if you get a notification that one has been blocked when you click on the message. If you do, you can usually click the notification icon and will be able to allow pop ups from *.mail.comcast.net
Post back with the name of the one you use if you can't figure it out, and someone will help you.
Comcast employees must be authorized to post in the forum in an official capacity. Employees posting here have their names in red and are designated as employees. Names not in red are customers.
This is done to protect customers and for assurance that they are dealing with a Comcast employee. Non-Authorized Employees are allowed to post but cannot state they are employees nor can they allude to being employees.