With ejabberd 15.09, it works

cweiske — Mon, 02 Nov 2015 12:00:09 +0000

With ejabberd 15.09, it works via command line:

$ ejabberdctl send_message groupchat alice@example.org/resource room@conference.example.org "''" 'message'

The "''" (double quote, single quote, single quote, double quote) is to set the subject parameter empty.

Note that the user's resource has to be online when sending.

ejabberd - Comments for "[solved] Send message to MUC channel via shell"