Forum communautaire Thunderbird

All of a sudden I keep getting Mailer Daemon messages to all my outgoing emails on AOL. Any ideas as to why this is happening and what to do about it?

when trying to block emails of spam messages the prompt does not always appear

Thunderbird: Geburtstage werden nicht in den "Kalender" übernommen. Die Darstellung Termine/Tagesplan unvollständig.