I've always viewed my comcast email account from the icon on my mac, now my mac tells me: "You can’t use this version of Mail with this version of Mac OS X" it goes on to tell me:

"You tried to open Mail version 4.5 (1084/1085) in:

/Applications/Mail (original).app

It can’t be used on this version of Mac OS X. Try opening the version of Mail located in the Applications folder on your computer. For more information, click the Help button."

The help button offers no help. No one seems to know how to help me even after paying a tech support group to do so!