Difference between NUSmail and Subscription-based Mailing(NUSgroups)

Some of the differences between Email Distribution (NUSgroups) and NUSmail:

Items	Subscription-based Mailing (NUSgroups)	NUSmail
Group membership is hidden from other members	Yes	No
Users can create their own mailing lists without waiting for administrator intervention	Yes	No
Members can join/leave groups on their own	Yes	No
Sender will not receive any non-delivery-notification when the mail is not delivered to any particular recipient	Yes	No
Group owner can choose whether replies will be delivered to the original sender or to the group members	Yes	No
Group owner can choose whether postings can contain attachments/images	Yes	No