If it's in Fritz you can save the game (go to file > save game as) and then attach that file to the e-mail.
But you know it can be in pgn and text format right? Just 1.e4 e5 2.Nf3 etc. If you have it in a text file and want to paste it into fritz but it's not going in right, just be sure all the notation is correct and you're putting variations inside of parentheses.
I have analysed a game and it is in text format. How do I change it to pgn and then email it? I have fritz in front of me but it is not helping. This should be easy but I just can not see a way.