@caitlin  Sounds like an interesting use case to use Intercom for your internal team queries, I have a client who is using it this way as well.   This should be doable from any workflow by adding that email domain as an audience filter -- I just did the same thing for a consulting client this past week to prevent Fin AI from replying to some internal messages that come through to Intercom as well. 

If you are using the default email auto response option it does say that workflows will override that message, if you can’t turn it off maybe you could setup a more appropriate one for the internal team so they get an auto response that is customized to their messages instead. 

Hope this helps!