Mailing list usage
Use of mailing lists typically fall into three main usage patterns:
Announcement lists: These are typically used to distribute
information about a product, a service, an event or other noteworthy
information. In most cases, the organization that runs the mailing
list controls what information is sent out.
Open discussion: Anyone who is a member of the mailing list can
submit information to be distributed to the entire group. In this way,
a group discussion can take place.
Moderated forums/discussions: A hybrid of the two types above,
where members of the group can submit information to be distributed to
the entire group, but submissions need to go through an approval
process before they are distributed.