Generate posting failure notifications
If a message is sent to a list and is rejected due to sender being rejected or incorrect password the subsequent notification is not sent. This can help reduce traffic where spammers have sent to the address and used a forged email address.
Advanced Logging
This setting allows the logging of list activity and any problems that may arise. To improve speed and to not create logs disable the activity and debug logs.
For more information on creating lists, click here.