Publish your domain’s DMARC history to circumvent phishing and spoofing. Should you’re utilizing a shared IP account from the company like SendGrid, don’t create DKIM and DMARC. It forces your mail streams to have “area alignment” that can result in your emails to are unsuccessful authentication and start bouncing. https://itsupport45440.ampblogs.com/what-does-bulk-sms-mean-63549025