Is this related to channels only (no private messages)?
The code below should do what you want:

Code:
on ^*:TEXT:+UX *:#:{
  echo # message from $nick $+ : $2-
  haltdef
}


In case you want it to work with private messages as well...:
Code:
on ^*:TEXT:+UX *:*:{
  echo $iif(#,#,$nick) message from $nick $+ : $2-
  haltdef
}

* cold edits his posts 24/7