The wikinews-l list has about 68000 moderated messages. Which is *extremely* high. The list seems active (last message July 2015). It has one list administrator who has not edited since 2010 (https://en.wikinews.org/wiki/User:Chiacomo).
New administrators should be assigned (list handover). Should be discussed by the Wikinews community with either an interim admin to ensure legitimate emails get through or otherwise.