I'm a newbie as an exchange admin, so please spare me when I getting
wrong in some basic concepts.
Now an exchange server is in my hand, and a observed some users are
receiving junk/virus mails sent by some "may even non-existent" account. I
want to stop that but I have no idea whether it's being sent from outside or
just a virus infected PC inside. I don't have clear network structure in
mind, but there is a few web servers connected to the network using VPN
that'll also use exchange to sent mail.
So I think this question should be in fact two questions: 1) How to
restrict email be sent into the domain(I have little concern about message
sending out using our domain name, afterall it's out of my control) that's
using our domain name, but not originate by a server inside the domain? 2)
How to restrict certain domain accounts cannot be used to create email?
(e.g.: webmaster group account should be used to receive emails only, and
there's little reason why someone will have to use that account to send
email out.) Or, if any computer in the domain is sending emails out through
exchange using that account, I can get a report on which machine is sending.
I know these are pretty long
questions. A pointer to URLs of related
articles will be enough. Thank you for viewing such long post.
Lau Lei Cheong