Very helpful in setting up our SPF records, DKIM records, and DMARC records for all four of our domains and subdomains. The interface is very easy to use and set up the rules you need for your environment. It works well but sometimes it doesn't show my emails correctly and I have to wait for it to refresh. Sometimes it takes a long time to load when I first log into it. It needs more features. It should be able to track and mark multiple senders for the same message as some ISPs block messages from certain IP addresses. We are able to block spammers and protect our customers from spam.