I am in distribution group edit screen and I see two options in the delivery managment section. One is "Only senders inside my organization" and the other one is "Senders inside and outside of my organization". I understand that I can specify an outside sender's email address to allow him to use my distribution group. However, It is not what I want. I would like to allowed all email addresses from an outside domain to use my distribution group instead of only specific email addresses. Can we set something like *@domain.com as accepted sender which can send email to my distribution group email address? I just don't want my distribution group email been abuse by other outside sender.