No email forwarding "error occured" on saving

Oh Comcast

Was able to delete some older email forwards to allow me to create a new relationship. However, I get "an error occured" when trying to save the new forward relationships. Using the amdinistrator account. Not sure what the trouble is about, I waited 24 hours from the deletions to allow the system to update.  Email me at bob@groundzeropost.com, that is also the domain affected the trouble. 

Thanks