Hi,

Eclipse always (almost) gives an explanation about why a program doesn't compile in 'problems' tab. So, first read it.
If you still don't have a clue, post the error compiler says. With that information we'll be able to help you much better.

Anyway, in your case, I guess you missed import appropriate libraries to Main class. So, just import classes Email, SimpleEmail and DefaultAuthenticator.

Regards,

Albert.