we have RT 5.0.1 configured to have incoming mails sent via procmail to rt-mailgate.
Incoming HTML-mail is received correctly and viewing the ticket in the RT-GUI correctly shows the mail with HTML-formatting.
However, the mail forwarded to the subscribers for the queue(s) receive the mail converted to plain text. Also, the auto-reply mail contains the original message as plain text.
Sending a copy of the incoming mail from .procmailrc directly to another email address arrives as HTML-formatted mail, showing that the conversion to plain text must occur while or after being be handled by rt-mailgate.
Any suggestions what is happening?
P.S.: This is most likely not an issue specific to RT 5.x, as I think we saw that in our previous RT 4.4.4 installation as well (and probably also with earlier versions).