Cannot add to the server Junk Email Lists, you are over the size allowed on the server. The Junk Email Filter on the server will be disabled until your Junk Email Lists have been reduced to the size allowed on the server.
Would you like to manage your Junk Email Lists now?
This issue occurs when your whitelist/blacklist reaches 512K, which is the default maximum for the exchange Information Store.
In order to resolve this issue you will need to open the Registry Editor, go to
and make the following entry:
Max Extended Rule Size
Data: anything larger than the default "512000" with Base: Decimal