[wp-meta] [Making WordPress.org] #4782: Filter wp_mail() on .org from trying to mail prohibited addresses

[Making WordPress.org]

#4782: Filter wp_mail() on .org from trying to mail prohibited addresses
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 Reporter:  Ipstenu  |       Owner:  (none)
     Type:  defect   |      Status:  new
 Priority:  normal   |   Milestone:
Component:  General  |  Resolution:
 Keywords:           |
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Comment (by dd32):

 I've added something in the private repo that does this:


 r15456-dotorg:
 {{{
 Mail: Add an mu-plugin to filter outgoing wp_mail()'s.

 This blocks emails to hosts we consider "unsafe" which is a bad term, but
 is roughly equal to hostnames we consider spam or who we have mail
 deliverability issues to.

 A PHP warning will be triggered when this happens for logging /
 discoverability purposes.
 It'd be nice to add a `Require-Recipient-Valid-Since:` header for
 appropriate hosts once we start to store user email change dates.

 See https://meta.trac.wordpress.org/ticket/4782
 }}}

 In addition to #4781 we should also prevent new forum subscriptions for
 affected users.

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Ticket URL: <https://meta.trac.wordpress.org/ticket/4782#comment:2>
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