- SPF — lists which servers may send email on behalf of your domain. Example:
v=spf1 a mx ~all - DKIM — adds a digital signature to every message, proving it wasn’t altered in transit.
- DMARC — tells receivers what to do with messages that fail SPF and DKIM. To start:
v=DMARC1; p=none; rua=mailto:admin@yourdomain
On our hosting
If the domain uses our nameservers, SPF and DKIM records are created automatically when the hosting account is set up. To check, look under E-mail Manager → E-mail Accounts or DNS Management in DirectAdmin; if DKIM is off, enable it there or contact support.
Add the DMARC record under DNS records as a TXT record named
_dmarc.