We run an Exchange 2000 server which processes approx. 25000 messages per day.
The SPAM/Virus/Cold Calls(sales) are getting out of control.
We would like to know of an off the shelf product which would allow us to refuse to accept email from
anyone who is not is a predefined whitelist. The whitelist would allow us to enter email address, domain, or
delivering email server IP to allow access.
Would like to be able to auto-send a reply back to rejected sender with a list of steps that would be taken to have their
identiy added to our whitelist.
Have looked at many Anti-SPAM tools that integrate with Exchange but am coming up short.