Publish your domain’s DMARC history to prevent phishing and spoofing. If you’re utilizing a shared IP account from a provider like SendGrid, don’t set up DKIM and DMARC. It forces your mail streams to own “domain alignment” that may cause your emails to are unsuccessful authentication and begin bouncing. https://it-support35431.blogs-service.com/57701199/the-smart-trick-of-smtp-server-that-no-one-is-discussing