[wp-trac] [WordPress Trac] #25239: $_SERVER['SERVER_NAME'] not a reliable when generating email host names

[WordPress Trac]

#25239: $_SERVER['SERVER_NAME'] not a reliable when generating email host names
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 Reporter:  layotte                              |       Owner:
     Type:  defect (bug)                         |      Status:  new
 Priority:  normal                               |   Milestone:  Awaiting
Component:  Mail                                 |  Review
 Severity:  normal                               |     Version:  trunk
 Keywords:  has-patch dev-feedback needs-        |  Resolution:
  testing                                        |
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Comment (by nacin):

 nginx has an odd quirk that, given:

 `server_name example.com blog.example.com microsite.example.com;`

 And:

 `fastcgi_param SERVER_NAME $server_name;`

 When accessing microsite.example.com, SERVER_NAME will be set to
 example.com. This is akin to always using ServerName in Apache, rather
 than using ServerAlias (which is what happens).

 I agree that SERVER_NAME should not be used, as depending on the setup it
 is not going to match HTTP_HOST. That said, if you are using a catchall
 like `_` (it is actually meaningless, any special character will do), you
 should consider doing something like `set $name X` in your server block to
 ensure $server_name is what you want it to be, or actuall change the
 `fastcgi_param` call to set SERVER_NAME to `$host`. That will fix your
 issues.

 So, this isn't a duplicate of #16805 — rather, we should investigate and
 consider a switch to HTTP_HOST here.

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Ticket URL: <http://core.trac.wordpress.org/ticket/25239#comment:2>
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