In GroupWise you can set the allowed address formats. We have both the userid.post office@domain and userid@domain set. Is there any reason to keep the first one, userid.post office...

The reason I ask is that we get email from the outside addressed to userid.postoffice. (I believe it is because someone forwarded out an internal email and then that person replies back and gets that address, but not sure). When our email filter goes to look up valid addresses, it looks for userid@domain name only.

Can I just uncheck that option? What happens if I do?