He doesn't know anything about that.. What can he do?
Sorry for that but if he doesn't know anything about that he should not host sites.
I cannot say what's wrong. The problem is that you cannot use the mail function (standard php function) as it is not defined.
He has just started hosting.. I'm the first test person.
Except that, everything is working fine..
I think it has something to do with software that still isn't installed, and that he will install it this week.