[wp-trac] [WordPress Trac] #56779: wp_mail header ignores multiple headers with same name

[WordPress Trac]

#56779: wp_mail header ignores multiple headers with same name
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 Reporter:  pentatonicfunk                       |       Owner:  (none)
     Type:  defect (bug)                         |      Status:  new
 Priority:  normal                               |   Milestone:  Awaiting
                                                 |  Review
Component:  Mail                                 |     Version:
 Severity:  major                                |  Resolution:
 Keywords:  needs-patch has-test-info good-      |     Focuses:
  first-bug                                      |
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Comment (by rishabhwp):

 I was able to reproduce the issue and would love to work on fixing it.

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Ticket URL: <https://core.trac.wordpress.org/ticket/56779#comment:2>
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