[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
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 Reporter:  desrosj       |       Owner:  SirLouen
     Type:  defect (bug)  |      Status:  accepted
 Priority:  normal        |   Milestone:  6.9.1
Component:  Mail          |     Version:  6.9
 Severity:  normal        |  Resolution:
 Keywords:  close         |     Focuses:
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Comment (by SirLouen):

 Replying to [comment:23 dmsnell]:
 > supposing we narrow this down to those specific triggers, including
 misconfigured `-f` parameters, could we add in a check for that and adjust
 it? for example, if we detect the duplicate `-f` could we remove one
 before attempting to send the mail? or will the act of checking also
 trigger the failure?

 Yes, this is already sorted

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Ticket URL: <https://core.trac.wordpress.org/ticket/64368#comment:24>
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