SPF, DKIM, DMARC

Test the Spammyness of youre-mails
https://www.mail-tester.com

Sørg for at emnefeltet har relevant indhold, f.eks. "Question about service provided) - ikke bare "Test" eller lign.
Selve e-mailen skal også have et relevant indhold, gerne en 25-50 ord (kopier en tekst fra et andet sted)

Check if your domain has these 2 email signatures set up and valid (DKIM)
https://www.mail-tester.com/spf-dkim-check

Selector = Selector1 og Selector2

dmarcian.eu
mxtoolbox.com DKIM:domain.dk:selectorX

https://docs.microsoft.com/en-us/powershell/exchange/exchange-online/connect-to-exchange-online-powershell/connect-to-exchange-online-powershell?view=exchange-ps

https://docs.microsoft.com/en-us/office365/securitycompliance/use-dkim-to-validate-outbound-email#SetUpDKIMO365

https://blogs.technet.microsoft.com/timmcmic/2018/02/09/office-365-spam-detection-and-reverse-dns-lookups/