
Secure Your Domain with SPF, DKIM, and DMARC
Basic Setup for Outlook and Gmail
Secure your domain and improve email delivery with these DNS records:
✅ SPF
v=spf1 include:spf.protection.outlook.com include:_spf.google.com -all
Add as a TXT record for @
.
✅ DKIM
Enable in:
- Microsoft 365 Admin Center
- Google Workspace Admin Console
Then add the provided CNAME/TXT records like:
selector1._domainkey.yourdomain.com
✅ DMARC
v=DMARC1; p=quarantine; rua=mailto:you@yourdomain.com
For stricter protection:
add TXT _dmarc
name and value:
v=DMARC1; p=reject; rua=mailto:you@yourdomain.com
Check SPF and DMARC on mxtoolbox.com
You can also verify the records using Google Admin Toolbox
Pro tip: Only one SPF record per domain. Double-check before saving.