[wp-trac] [WordPress Trac] #64367: Upgrade to WordPress core 6.9 from 6.8.3 causes WooCommerce email failure?

[WordPress Trac]

#64367: Upgrade to WordPress core 6.9 from 6.8.3 causes WooCommerce email failure?
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 Reporter:  philipg100    |      Owner:  (none)
     Type:  defect (bug)  |     Status:  new
 Priority:  normal        |  Milestone:  Awaiting Review
Component:  General       |    Version:  6.9
 Severity:  normal        |   Keywords:
  Focuses:                |
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 We use a staging site and regularly test WordPresss core upgrades and
 plugin upgrades before implementing them in the live environment. We
 upgraded WP Core 6.8.3>>>6.9 and also Woocommerce 10.3.4>>10.3.6. When we
 did some test purchases we noticed that email notifications from
 Woocommerce to site admin were no longer working. In order to narrow down
 what was causing the issue we rolled back the staging site to 'pre-
 upgrade' and did some test purchases and the emails worked again. We then
 upgraded JUST WordPress Core and tested again and found that email
 notifications no longer worked. Is there something that has happened maybe
 to PHP mailer?

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Ticket URL: <https://core.trac.wordpress.org/ticket/64367>
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