Key points
- CNAME points a name to another name (e.g. mail.yourdomain.com)
- TXT stores text — used for SPF, DKIM, DMARC, verification
- Email authentication mostly uses TXT
- Subdomains can use CNAME for verification
How to do it
- TXT: for SPF/DKIM/DMARC/verification strings
- CNAME: for subdomain aliases & some provider verifications
- Follow the exact type each record asks for
Common mistakes
- Using CNAME when TXT is required (and vice versa)
- Forgetting trailing dots
- Wrong record type = verification fails
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