If you found this post. We feel your pain. We’re seeing sporadic issues specific to Gmail’s Address Recipient Mapping is having some issues. It’s completely down for many. We’re assuming this is accidental as it is very disruptive. We work with 1,000’s of organizations and Address Recipient Maps are extremely popular. Hopefully, Google gets this fixed soon (they don’t know yet - we’re trying to get it communicated).
If you’d like us to keep you in the loop drop us a note.