Email question

I have tried to set up my gmail and yahoo accounts using the email program that comes on macbooks.....anyone know how to do this? I typed in all the info and still couldnt get it to work..

To the best of my knowledge, the free yahoo mail account doesn't support POP3 so you can't use it with Mail.

As for setting up Gmail with Apple Mail, there is a nice tutorial published by Google itself. Just go to your Gmail settings > POP3 and forwarding > and click on the instructions link. From there select Apple Mail and follow instructions.