[wp-trac] [WordPress Trac] #49687: wp_mail() - Why is no envelope sender defined?

[WordPress Trac]

#49687: wp_mail() - Why is no envelope sender defined?
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 Reporter:  vbbp                        |       Owner:  (none)
     Type:  enhancement                 |      Status:  new
 Priority:  normal                      |   Milestone:  Awaiting Review
Component:  Mail                        |     Version:  5.4
 Severity:  minor                       |  Resolution:
 Keywords:  dev-feedback needs-testing  |     Focuses:
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Comment (by knutsp):

 I agree that this change, not to set the sender, was harmful.

 The thing is the opposite as the indicated reason in the changeset. Not
 setting the sender causes the email to be flagged as spam, suspicious, or
 "via" in GMail. It affects all common mail systems I know, including via
 cPanel and other common hosting platforms, to Outlook/Hotmail, but mostly
 to Gmail, probably the most common of all.

 The change has given WordPress a bad reputation in ability to send emails
 "out of the box". A plugin is needed, either SMTP or, simpler, with a
 "phpmailer_init" action to fix it.

 The change should be reverted immediately to restore WordPress valid email
 sending capability.

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Ticket URL: <https://core.trac.wordpress.org/ticket/49687#comment:11>
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