This is an old thread but I am posting here because it is on the same topic.
In a group I own, I recently changed the email address of a user and he reported to me that he got the Bounce message -- and sent a screen shot.
When I look at my Bouncing members, this member has the B icon colored green. The others listed show the B icon colored red. What does the green color mean?
?Here is what I see when I hover over the B:
?His account is a account.? Looking through? GMF emails, there appear?to?be some protonmail users happily using? accounts.