[wp-trac] [WordPress Trac] #64368: `Could not instantiate mail function` errors sending mail in 6.9

[WordPress Trac]

#64368: `Could not instantiate mail function` errors sending mail in 6.9
---------------------------+---------------------
 Reporter:  desrosj        |       Owner:  (none)
     Type:  defect (bug)   |      Status:  new
 Priority:  normal         |   Milestone:  6.9.1
Component:  Mail           |     Version:  6.9
 Severity:  normal         |  Resolution:
 Keywords:  needs-testing  |     Focuses:
---------------------------+---------------------

Comment (by SirLouen):

 Following the latest comments by @jamieburchell @siliconforks and myself

 https://core.trac.wordpress.org/ticket/49687#comment:52
 https://core.trac.wordpress.org/ticket/49687#comment:58
 https://core.trac.wordpress.org/ticket/49687#comment:59

 With this config in both postfix and exim
 [[Image(https://i.imgur.com/9ZZ6T93.png)]]

 Nothing is really changing as expected. Not failing either.

 But finally with `sendmail` I got the error.
 [[Image(https://i.imgur.com/PYubKKb.png)]]

 Postfix and Exim literally ignore the `-f` and everything. But `sendmail`
 is more "purist".

-- 
Ticket URL: <https://core.trac.wordpress.org/ticket/64368#comment:3>
WordPress Trac <https://core.trac.wordpress.org/>
WordPress publishing platform