I am trying to use the wonderful event_registration plugin for a site that will have conference registrations and it works great except that the confirmation emails when payment is received are not being sent. I finally narrowed it down to wp_mail. I modified the plugin to immediately call mail() following the wp_mail call and the call to mail() works but not the one to wp_mail.
Is there something that needs to be configured in apache or php to get wp_mail to work properly? I’d rather not have to use a hacked up plugin on a client site if I can help it. I’ve searched google but no luck yet.