Email Security
#SPF #DKIM #DMARC #CNAME #TXT #Email

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.