I have since solved this problem by moving my forwarded business mail to Gmail.
Allow any employee to ask to be added or removed to/from a DL; based on the policy of the DL, this could be automated (with another policy for that DL which specifies whether anyone should be notified) or it could require approval by an admin for that particular DL.
Personally I am mortified that an adult professional woman would send that email to our hired management company! Is there anyway to make sure they understand how apologetic I am for this assss??
Any one may like to guide me suitably.