Publish your area’s DMARC record to stop phishing and spoofing. When you’re utilizing a shared IP account from the service provider like SendGrid, don’t create DKIM and DMARC. It forces your mail streams to own “area alignment” that might cause your emails to are unsuccessful authentication and start bouncing. https://cyberattackmodel30527.bloginder.com/27314833/send-bulk-emails-an-overview