The list has a high number of moderation messages. It's a mix of recent use and old usage as well as relating to a project by the WMF. Seems it was administrated by an ex-WMDE employee and since never repurposed.
This is a task to track whether this should be disabled to give to the Discovery department for their maps project (or kept with all emails discarded. May be of use as it is OSM as well).
Contacted @Tfinc via email.