[wp-trac] [WordPress Trac] #52822: PHPMailer change in WordPress 5.7 breaks working sites

[WordPress Trac]

#52822: PHPMailer change in WordPress 5.7 breaks working sites
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 Reporter:  tigertech                |       Owner:  (none)
     Type:  defect (bug)             |      Status:  new
 Priority:  high                     |   Milestone:  5.7.1
Component:  Mail                     |     Version:  5.7
 Severity:  normal                   |  Resolution:
 Keywords:  needs-patch 2nd-opinion  |     Focuses:
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Comment (by galbaras):

 @SergeyBiryukov Perhaps, just as an interim measure, WordPress can check
 for `ini_get( 'sendmail_from' )` and, if set, pass it explicitly. This
 will simply restore things to the way they were before 5.7.

 Once phpMailer reverts that change, or we find out why it was a good idea,
 we can figure out what to do next.

 Either way, 5.7.1 is the time to deal with this issue.

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Ticket URL: <https://core.trac.wordpress.org/ticket/52822#comment:9>
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