Bharat Suneja [MVP] (Expert):
Q: How can I allow someone e-mail if our exchange server bouncing their e-mail as SPAM?
A: Since you haven't specified the version of Exchange - Exchange Server 2003's content filtering had no way of whitelisting SMTP addresses and domains, but you can add IP addresses to Connection Filtering's Global Accept List. Exchange Server 2007 allows you to bypass sender domains or SMTP addresses, and you can exempt your users from particular anti-spam components as well - including content filtering. http://exchangepedia.com/blog/2007/01/exchange-2007-content-filter-whitelist.html
Hi Tung Dang,
This might be of interest to you:
"Exchange Server 2007 can apply whitelists and blocklists on Edge Transport servers and Hub Transport servers that have the Exchange Server 2007 Anti-Spam components installed.
Whitelists are configured in two places. Whitelisted IP addresses (or the IP Allow List) are handled by the Connection Filter agent but are not configured at the organisation level. Instead they are configured on the Edge Transport or Hub Transport servers. Typically the IP address whitelist is configured on any Transport server that accepts email from the internet."
Full article with screenshots: Managing whitelists and blacklists in Exchange 2007