I'm used to the //WL2K issue and the associated message. The new message "No valid recpient (sic) address" is terribly misleading and resulted in my wasting a couple hours trying to get out an email last night. Please change it. "sender not in whitelist" or "unauthorized sender" or anything remotely resembling what is actually going on would be far preferable. Giving a misleading error message is worse than no error message at all.