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DKIM with multiple mail systems

Holger Nielsen
Last Modified: 2019-12-16
We are planning to set up DKIM for a mail domain, example.dk.
I can find a lot of good advice on the Internet. But there's one question I can't find an answer to.
We Use Exchange online for most of our mail, but we also have an on-premise SMTP server for routing mails from our webservers. And we are using a cloud service for our news letter service. How can DKIM be set up when there's multiple systems sending mail from our example.dk domain?
All the guides I have found on the Internet are about a setup with only one mail system.

Best regards Holger Nielsen
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