Today’s Email Insider column details three steps legit marketers should take to get delivered to Hotmail. It leaves off one of the most obvious — Return Path’s Sender Score Certified. Hotmail – and more than 150K other domains — use Sender Score Certified as a “safelist” to separate reputable senders from bad ones. If delivery to Hotmail is important to you, and you have a good email reputation, Sender Score Certified needs to be part of your delivery repertoire. It’s that simple.