Hello,
I would like to use content negotiation to send text/html to IE style browsers and application/xhtml+xml to Mozilla style browsers. Thanks to
This article, I've been able to fix the validation errors (in roundcube/program/include/rcube_shared.inc) and change the doctypes. The source indicates (because I tell the PHP to send different code with different mimetypes) that the correct mimetype has been sent. However, when I actually check to see which mimetype is being sent to the browser, it always comes up as text/html.
Is there some code preventing me from sending application/xhtml+xml? If so, which file is it in and how can I fix it?