Hello,

Can you tell me what files deal with sending out the activation email? is it just the functions.inc

Yes. In register.inc.php the function my_mail is called (if the option is enabled in your forum settings!). The my_mail is located in functions.inc.php.

/Micha

What option is that?

I notice in the advanced settings the mail_parameter box is blank, I don't remember if that has always been blank.