[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:  has-patch     |     Focuses:
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Comment (by siliconforks):

 Replying to [comment:59 Monarobase]:
 > The reason we consider SPF not to be the concern here is that SPF
 configuration has always been part of email delivery, and most hosting
 providers already handle this today. When domains are hosted with us, SPF
 is preconfigured; when they are not, customers are generally advised to
 copy or adapt existing DNS records. In other words, this change doesn’t
 materially alter the SPF situation.

 My point is that this change can break SPF on servers where this was
 working before.  I'm still not entirely sure if you're disputing that, or
 if you simply don't consider that a major problem  because it's something
 that can easily be fixed.

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Ticket URL: <https://core.trac.wordpress.org/ticket/64368#comment:60>
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