Publish your area’s DMARC report to stop phishing and spoofing. If you’re using a shared IP account from a company like SendGrid, don’t build DKIM and DMARC. It forces your mail streams to own “area alignment” that can result in your emails to are unsuccessful authentication and start bouncing. https://it-support22221.dm-blog.com/26823734/5-simple-statements-about-mautic-explained