picklewagon/new-user-approve — pull request #1 by afragen (2013-09-13 23:44:45+00:00)
Title: fixes duplicate 'MIME-Version' email header

wp-includes/class-phpmailer.php already adds this header. When present here results in duplicate which can be filtered by email server as having bad header (duplicate header). On many email servers messages with bad headers are dropped.