Setting up an e-mail account can be confusing if you've never done it before, and unless you're using AOL or another ISP (Internet Service Provider) that provides mail services you will need manually set up your e-mail program so you can send and receive messages. We have provided the link below to Comcast's help page because it has clear instructions on how to setup MS Outlook Express.  Outlook and other mail programs are setup in a similar manner.  No matter what ISP you currently subscribe to, the process is pretty much the same.

All you need to know is your incoming and outgoing server names
which your ISP should provide for you at their web site, your account
name and password.  Once you know your server names (example of
incoming server name: mail.comcast.net, example of outgoing server
name: smtp.comcast.net) You can click on the link below for detailed
instructions on how to set up your e-mail accounts.  Good Luck!

Comcast e-mail Support