This is best answered by the Business community on your other thread: https://community.mcafee.com/message/174036#174036
Are you referring to SiteAdvisor or what McAfee product?
The product is SCM Anti-spam Aplyance version 5.
OK I moved your other thread to Business > Email and Web Security > Email Security (formerly GroupShield) as a more appropriate spot and they should deal with your question there.
I'm not sure if you original question has been answered in the meantime by other ways or your issue has resolved already, but please look into this KBarticle on reporting false positives in email reputation filtering: https://kc.mcafee.com/corporate/index?page=content&id=KB72091&actp=search&viewlo cale=en_US&searchid=1309634442289
I'm also not sure if you are an admin of a McAfee product blocking some sending email server due to bad reputation, or you are the admin of one such bad reputation server. It is the admin of the McAfee product who can turn off reputation filtering for a given sending email server or domain (please see specifics in the help of that particular McAfeeproduct).