What is the SPF & DMARC Record Builder?
A form-based builder that turns your mail setup choices into valid SPF and DMARC TXT record strings, so you don't have to hand-write the syntax.
How it works
Everything happens in the browser: as you toggle which mechanisms to allow (a, mx, include: for providers like Google Workspace) and pick an SPF enforcement mode (~all, -all, ?all), the tool concatenates them into a v=spf1 string live. The DMARC side works the same way — your chosen policy (none/quarantine/reject), reporting address, and enforcement percentage are assembled into a v=DMARC1 string as you edit the fields.
SysAdmin & security use cases
- Write your first SPF record when setting up Google Workspace or Microsoft 365 for a domain.
- Add an include: mechanism for a new email provider without breaking the existing record.
- Roll out DMARC gradually, starting at pct=10 and working up to full enforcement.
- Generate a strict p=reject record with a reporting address once you're confident nothing legitimate will be blocked.