Re: User Registration
One thing I always thought was interesting was that mail appears to be sent from firstname.lastname@example.org, whether or not that is a valid email. So, if you responded to your password email or something, it would be sent to that bbpress@ address, which might be invalid, so it would bounce.
I wonder if email@example.com has to be set up as a valid email account on the server, so if the SMTP server says “let me make sure this is one of my users before I sent out email for him” it will work. Since you wouldn’t normally have a firstname.lastname@example.org address already set up, maybe some MTAs don’t like it and give up on the mail altogether.
Why wouldn’t the email just be sent from the admin email address since we’re asked to enter it in config.php anyway?