[wp-trac] [WordPress Trac] #28473: wp_mail incorrectly parses multiline From header

[WordPress Trac]

#28473: wp_mail incorrectly parses multiline From header
--------------------------+-----------------------------
 Reporter:  arty.name     |      Owner:
     Type:  defect (bug)  |     Status:  new
 Priority:  normal        |  Milestone:  Awaiting Review
Component:  Mail          |    Version:  3.9.1
 Severity:  normal        |   Keywords:
  Focuses:                |
--------------------------+-----------------------------
 `wp_mail` tries to parse `From:` header when it is contained in headers.
 It fails when the header is multiline. Multiline headers are common when
 non-ascii characters are used and quoted-printable escaping kicks in.

 Example input:
 {{{
 From:
 =?UTF-8?Q?=D0=92=D0=B7=D0=B3=D0=BB=D1=8F=D0=B4=20=D0=BD=D0=B0=20=D0=BE?=
 =?UTF-8?Q?=D0=BA=D1=80=D1=83=D0=B6=D0=B0=D1=8E=D1=89=D0=B8=D0=B9=20=D0=BC?=
  =?UTF-8?Q?=D0=B8=D1=80?= <live-positive at yandex.ru>
 }}}

 Parsed email in `$from_email`:
 {{{
 =?UTF-8?Q?=D0=92=D0=B7=D0=B3=D0=BB=D1=8F=D0=B4=20=D0=BD=D0=B0=20=D0=BE?=
 }}}

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Ticket URL: <https://core.trac.wordpress.org/ticket/28473>
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