I seem to suddenly be getting an inordinate number of "Failed: The specified string is not in the form required for an e-mail address". These are distributions I have just set up so its not like they were working and stopped. However, the set up is the same as hundreds of other functioning emails. Examples of the email addresses that are failing are:
As always, thank you!
Update: Still happening with virtually all new setups in the program, including email addresses internal to my organization. Any hep would be appreciated.