I am having some problems with phpBB, since my server move
the mail alerts aren't sending out anything, when a new reply is posted, nor to e-mail the admin of a new member of the forum for approval, the only thing that works is the PM notifications and mail being sent to the user. Any ideas on what the problem is, I am about at the end of the rope with the forum..

I have been using invision out of the free board for around 6 months so Im a bit rusty on phpbb...
But maybe you have to setup the mail settings in the admin panel again if they were lost, or if they have changed.

I dont know if phpbb uses the PHP mail function but its worth checking that it isnt disabled because that might also have something to do with the problem

Yeah I use Invision as well.. I like that over phpBB.. sorry