Links:

• Outlook.com/hotmail.com spam folder : https://discourse.mailinabox.email/t/emails-to-outlook-always-flagged-as-spam/405/17
• Mail tester : http://www.mail-tester.com/web-m3e05
• Sender score : https://www.senderscore.org/lookup.php?lookup=rapanden.dk&validLookup=true