Fixed email sending problems!

[encode]

OK, now users should correctly receive account activations and other stuff via email!

Previously registered users will be activated by me manually!

[encode]

Just tested user registration for myself - it's works now!

[Fallon]

Hi there, encode.

For your information. The activation emails are sent from yahoo. A domain which is often abused.
So yahoo is blacklisted with some of the competition.

For people who use the -for instance- popular public accounts of google's gmail, the activation mail may end up in the SPAM folder, instead of the inbox.

Thanks for your work.