By default, every message posting to a list causes an entry to be written to the Lyris List Manager log. Nightly digest and index mailings are also recorded. This information is
useful for tracking the overall usage of a Lyris List Manager server, and also for billing purposes.
If you have no need for this logging information, you can disable this feature, and you will save a little bit of disk space which is used for the Lyris List Manager log database table.