Hello @PastorSteveS7 ,   Here are some general best practices for deliverability. Deliverability can have a lot of variables, from elements on our side, on your side, on the recipient's side, and in their email system company's side. It's also a generally good idea to set up self-authentication since you're sending using an address with your own, unique domain. With all the delivery gatekeeping and anti-spam/malware safeguards in place, it's necessary for businesses using an ESP to have this in place.   If you'd like to learn more about safelisting, and what it entails: Safelisting domains in a security system Safelisting email addresses in an email client or security system   If you're wanting more in-depth, specialized insight on your current deliverability, it'd be worth speaking with one of our Deliverability agents.   See also: Email Authentication FAQ ... View more