posting

A message sent to a newsgroup or mailing list (may also be

called "a post") or the act of sending it. Distinguished from

a "letter" or ordinary electronic mail message by the fact

that it is broadcast rather than point-to-point. It is not

clear whether messages sent to a small mailing list are

postings or e-mail; perhaps the best dividing line is that if

you don't know the names of all the potential recipients, it

is a posting.

[Jargon File]