As of the time of this post, the Discovery GC RP 24/7 server has ceased to support /setmsg functionality on the basis that it encourages lazy roleplay and a lack of situational awareness, and also allows users who do not have a sufficient enough understanding of English to mask this and is a problem concerning interaction in the roleplay environment.
For the most part, this move was spurred by the abuse of the setmsg commands as an attempt to circumvent the rules regarding roleplay prior to an attack. We, in general, find that setmsg is more often inappropriately used to that end.
Yes, we know that there are those of you who use it for sector location reporting or other potentially sensible situations. Sorry.