Am 03.02.2015 um 22:08 schrieb wally neuman1812@gmail.com:

Is it possible to post a message in all rooms so that it looks like the message is coming from the server? Like a broadcast message?

If not from the server, at least from My admin username?

No, not using „regular“ IRC commands.

Often IRC services (like Anope) provide something like a „GLOBAL“ command to send messages to all connected users.

Regards, Alex