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This is a patch to add an informational header to messages sent from PHP
via the mail() function. This can help to track which script on a server
was used to send a message, and which client caused it to be sent.
The header added has the form:
X-PHP-Script: <servername><php-self> for <remote-addr>
For example:
X-PHP-Script: www.example.com/~user/testapp/send-mail.php for
10.0.0.1
http://www.lancs.ac.uk/~steveb/php-mail-header-patch/
Steve.