[wp-trac] [WordPress Trac] #12728: Duplicate mime headers in MS activation emails

[WordPress Trac]

#12728: Duplicate mime headers in MS activation emails
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 Reporter:  nacin         |       Owner:           
     Type:  defect (bug)  |      Status:  new      
 Priority:  normal        |   Milestone:  3.0      
Component:  Mail          |     Version:           
 Severity:  normal        |    Keywords:  multisite
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 Original MU ticket: http://trac.mu.wordpress.org/ticket/1121

 From barry:
 >PHPMailer *should* detect the presence of an existing MIME-Type header
 and not add a new one. If you were/are using an old version of wp_mail()
 however, which also set an explicit MIME-Type header (pre
 http://core.trac.wordpress.org/changeset/5764), you end up with duplicate
 headers before ever getting to PHPMailer. PHPMailer does not remove
 headers, so you end up with dupe headers in your email. I don't really see
 any good reason to set explicit MIME-Type headers in the calling function,
 and I think they should be removed. Patch attached.

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Ticket URL: <http://core.trac.wordpress.org/ticket/12728>
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