additional_message_headers patch to allow unsetting of message headers
|Reported by:||iezzip||Owned by:|
Attached is a patch to allow unsetting of (existing) message headers.
Also, this provides the possibility to configure the additional_message_headers plugin in place, config.inc.php, instead of configuration over main.inc.php
I had to get rid of the "X-Sender" message header that is set by Roundcube. Some people use forwarding email addresses for Mailman mailing lists with their password in the original sender address... well well...