SPF and DMARC Entries for IONOS.com Hosting

Posted by on Jun 20, 2023 in Journal, Technology, Web Development

Just some notes, mostly for myself, on putting SPF and DKIM entries in place at IONOS.com.


How to configure SPF, DKIM and DMARC records?

To secure your e-mail service and make sure that you won’t have issues with e-mail spoofing, you need to set SPF, DKIM and DMARC records for your domain.

  • SPF – An SPF record is enabled by default for your domain name in our DNS zone. You can modify it if needed from Site Tools > Email > Authentication.
  • DKIM – By default DKIM should be enabled. To disable DKIM for your domain, go to Site Tools > Email > Authentication > DKIM > Deactivate.
  • DMARC – this is a TXT record that practically tells the receiver to send an email to a particular e-mail address if he gets spam emails from a certain domain. The record is added from Site Tools > Domain > DNS Zone Editor, and should look like this:
  • Name – _dmarc
  • TTL – 5 minutes
  • Value – v=DMARC1; p=quarantine; rua=mailto:email@your_domain.com
  • Change email@your_domain.com to your domain name and administrative email.

You can use custom SPF and DKIM values for your domains. You can add the records using the DNS Zone Editor in Site Tools.


SPF DNS Entries

TXT @ "v=spf1 include:_spf.perfora.net ~all"
TXT @ "v=spf1 include:_spf-us.ionos.com ~all" <--official from IONOS

DMARC Entries

TXT _dmarc "v=DMARC1; p=none"
TXT _dmarc "v=DMARC1;p=quarantine;pct=100;"