In the past we have had issues with with bounce backs on accounts that were re-created for users. I believe the issue is due to the users' x400 addresses. We are looking to remove the x400 from our default email policy to avoid this issue in the future. If I am understanding it correctly, by removing the x400 address, an account that is created in the future will not receive a bounce back because it is only looking at the SMTP address and not looking for a x400 address?
By removing the x400 address from the default policy and applying it, will that remove the x400 address for all accounts that have one or will it keep them and not add an x400 address for future accounts that are created?
Also, we are running Exchange 2010. Recently upgraded from exchange 2003 about 6 months ago.
Any help is appreciated.