I would like to disallow any messages which do not contain a certain string, say “MYSTRING”.
I would also like to remove “MYSTRING” from messages which do contain it.
So, basically it would be impossible to send a message which does not contain “MYSTRING”, but “MYSTRING” would be stripped out of all the messages sent.
So I’'ve taken a look at the ContentFilter plugin, and it looks like I could easily accomplish one or the other of these tasks, but not both together. Any suggestions would be greatly appreciated.