Set up SPF, DKIM and DMARC to stop emails landing in spam

Step by step

1. 01

   SPF: list authorized senders

   TXT @ → 'v=spf1 include:_spf.google.com include:mailgun.org ~all'

2. 02

   DKIM: cryptographic signature

   Your sending service (Workspace, SendGrid) generates the key — add the TXT record.

3. 03

   DMARC: policy + reporting

   TXT _dmarc → 'v=DMARC1; p=none; rua=mailto:dmarc@yourdomain.com' (start with p=none).

4. 04

   Monitor reports for 2 weeks

   Use Postmark's free DMARC monitoring.

5. 05

   Upgrade policy to p=quarantine, then p=reject

   Only after reports show no legitimate sender is failing.