I FOUND THIS POST when I go through the Draft post in the backend of my blog. It was drafted last year when I moved some emails to the IONOS Email system.  It is still helpful for the “Email Basic” users.

Here is a sample of one of my domains, whose email is served on the ionos.ca email service.

The domain is treated as an external domain in ionos.ca.

for example, the domain name is  webexample.win


Add a txt record for this domain at the Cloudflare panel.

The content is v=spf1 include:_spf.perfora.net include:_spf.kundenserver.de ~all

If you want to know why use this string, go to the ionos help page.


Then add another txt record for DMARC

The content is v=DMARC1;p=quarantine;pct=10;ruf=mailto:support@webexample.win


For more details about this setting, go to help.

David Yin

David is a blogger, geek, and web developer — founder of FreeInOutBoard.com. If you like his post, you can say thank you here

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