SMTP SPF DKIM DMARC checklist
A short sender-authentication checklist for transactional email before launching paid checkout or automated delivery.
Email checks
- SPF should authorize the email provider that sends on behalf of the domain.
- DKIM should be enabled and aligned with the sender domain shown to recipients.
- DMARC should exist, even if it starts with a monitoring policy while setup is validated.
- Retest after DNS propagation and keep the DNS values in a private launch note.
Free helpers
Build a Brevo or SMTP launch checklist, then draft starter SPF and DMARC records for the sender domain.
Paid pack
Get the private transactional email launch pack for SMTP relay, sender DNS, delivery logs, support, and rollback notes.
Short checkout: https://buy.signal-shelf.com/brevo. No subscription. Private delivery after Stripe confirms payment.
Operational email-delivery checklist only. Confirm DNS and provider settings in your own Brevo, DNS, and mailbox dashboards.