I neede a way to create a whitelist in Exchange 2003. Apparently the support for whitelisting is not very good. Here are some options:
1. Global Accept List
You can add the IP och a “Safe” mail server.
2. Custom Weighting
You can add an XML file containing rules for changeing the SCL value based on SUBJECT or BODY
3. White list Recipients (Note: Not Senders)
You can add certain recipients for whome you will not filter email.