There is a problem with version 2.11 with email's not pass on (usually i'm using linux, but this time it was on windows server)

After some digging, there is a quick fix to that:

Line 133 in register.inc.php:

Change:

$new_user_mailto = my_mb_encode_mimeheader($new_user_name, CHARSET, "Q") . " <".$new_user_email.">";

TO:

$new_user_mailto = $new_user_email;

Hope it will help someone :)

Cheers,
Keep the good work with this great little forum!!!!