How are badmails managed?
The badmails / hard bounces are automatically moved from the list where they are located to the “badmails” list. This will help you keep a clean database with valid addresses only. The treatment and classification of these addresses to "badmails" can vary from a few minutes to several hours after delivery. This varies depending on the type of error that the address returns.
The soft bounce, or temporay not deliverd email, will remain in your address book.