Automatic bounce processing is enforced on all lists.
Each day the Mailman server receives a bounced message from a member's address, the bounce score of that address is increased by 1.
When the server has received 5 bounces from an address. it will disable the address.
After 30 days of not detecting a bounced message, the bounce score for that address is reset to zero.
After an address is disabled, Mailman will send 3 warning messages (1 per day) to that address then, if it has not been re-enabled, remove the address completely.
Bounce notifications are automatically emailed to list-administrators.