Deliverability DNS checklist

Verify authentication and alignment before your first production campaign send.

• Single SPF TXT record includes only active sending sources.
• DKIM selector published and signing passes on test message.
• DMARC record present (start p=none for monitoring).
• From domain matches connected mailbox identity.
• Return-path / envelope alignment reviewed for SMTP sends.
• Custom tracking domain uses HTTPS and valid TLS cert.
• Seed sends checked in Gmail, Outlook, and one mobile client.