Utilities: Administration: Server: Server Settings: Automatic Maintenance: Purging Old Data
Clean outgoing mail queue
This setting determines how long completed mail messages (i.e., welcome messages and other one time messages) will remain in Mailings: Mailing Status: Mail Queues: Outgoing. The outgoing mail queue will display this number of days' worth of completed outgoing mail messages. Older mail will be deleted from the database.
Choosing "0" will result in all outbound messages being shown and saved by ListManager. This setting is not recommended, however, as the database table will just continue to grow and grow, and the SQL server processing requests for your ListManager installation will get slower and slower.
The length of time ListManager saves mailings sent to lists is configured in Utilities: List Settings: Automatic Maintenance: Purging Archives.
Clean incoming mail queue
This setting determines how long completed incoming mail messages will remain in Mailings: Mailing Status: Mail Queues: Incoming. The incoming mail queue will display this number of days' worth of completed incoming mail messages. Older mail will be deleted from the database.
Choosing "0" will result in all messages being shown and saved by ListManager. This setting is not recommended, however, as the database table will just continue to grow and grow, and the SQL server processing requests for your ListManager installation will get slower and slower.
Clean tracking records
This setting determines how many days tracking records (opens, clickthroughs, clickstreams and action events) are kept in the database. By default, this setting is "0", meaning tracking records will be kept indefinitely, even after the mailings for these records have been removed.
More
1. Utilities: Administration: Server
1. Utilities: Administration: Server: Server Settings: Automatic Maintenance: Error Mail
2. Utilities: Administration: Server: Server Settings: Automatic Maintenance: Logging
3. Utilities: Administration: Server: Server Settings: Automatic Maintenance: Purging Old Data
4. Utilities: Administration: Server: Server Settings: Automatic Maintenance: Mail Loops