This dropdown list allow selecting which messages are sent to Messageboard. Not all messages are relevant in all cases, so they can be disabled here. Available choices are:

Sorter CRC errors: These messages are sent when a check number calculation reveals an error in the communication between Libretto software and the sorter controller board. These messages should always be selected as any such errors may indicate a potentially important problem in a sorter. The messages can be turned off temporarily, for example when such a case is reported to Supa support but maintenance has not yet checked the cause of the problem.