yenyen 0 Newbie Poster

helo there, i need some help on database design for the email/messaging system. tis is one of the module. but i duno how to design the table structure and flow which involved : sender, receiver etc.
user A send msg/email to user B & user C, then the User B & user C can see the original msg from User A. after tat, user B reply msg to User A. User A can view the orignal msg + the replied msg and the user C also can view it .

another issues is i also have some problem in delete msg /email in each user mail box.

plz give me a hand.thank you.