Deliverability as engineering, not a settings checkbox
SPF, DKIM and DMARC are DNS records, and getting them wrong, an SPF record that does not include every sending source, a DKIM key that was never actually enabled by the sending platform, a DMARC policy set to reject before authentication is fully verified, causes real mail to bounce or land in spam, often silently.
We read the actual DNS records and authentication headers on outgoing mail rather than trusting a platform's dashboard status indicator, since a dashboard showing green does not always match what a receiving mail server actually sees. This is the same header and DNS-level troubleshooting our engineering teams do for any other domain issue, applied specifically to mail delivery.








