Publish your domain’s DMARC file to circumvent phishing and spoofing. If you’re employing a shared IP account from a provider like SendGrid, don’t create DKIM and DMARC. It forces your mail streams to get “domain alignment” that could potentially cause your emails to fail authentication and start bouncing. The https://it-support90115.answerblogs.com/26920719/rumored-buzz-on-smtp-server