Easy way to ensure that you have control over your sender reputation with one simple step! It's so easy I don't even use it myself anymore, but just set up some rules for my domain instead. The UI could be more user friendly as well. For example - why can only 5 domains per account? Why not 10 or 20 at least? Also - there should definitely be better support options available if something goes wrong (not always immediate). Ensure you are using this product correctly before buying; otherwise you will waste time setting everything up incorrectly which may affect others who need help from their Sender Reputation System too. We were able to block spammy emails coming out of our IP addresses without having users report them individually.