phpbb3 prosilver Multilple emails advising of warnings & PMs

Hi,

I have a pretty standard installation of phpbb3 running prosilver. Problem is that whenever a moderator or admin send a private message or warning to a user, the admin account gets sent copies of the email notifications each day advising that a warning or PM has been issued. This is resulting in the admin account becoming flooded with duplicate emails. Question: Will the board keep sending notification emails until the user has logged on and read the warning/PM?