When attempting to add a domain to the 'Blocked Senders' list on our Microsoft Exchange 2007 Edge Transport Server, I am receiving the following error message: "Error BlockedDomainsAndSubdomains has too many items; allowed maximum count is 800, actual count is 801." Is there anything that I can do to change this limitation. If not what are my options for adding new domains to the list. Thank you.

Hi, This is by design. We are unable to change the this limitation. Please remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread. Thanks Gen Lin-MSFT