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----- Mike Hammett Intelligent Computing Solutions Midwest Internet Exchange The Brothers WISP ----- Original Message ----- From: "Christopher Hawker" <ch...@thesysadmin.au> To: "nanog" <nanog@nanog.org> Sent: Saturday, January 20, 2024 5:07:39 AM Subject: Mail to Microsoft being falsely marked as spam/bulk Hi folks, I'm having an issue with Microsoft email filtering, where it is flagging messages from a private mail server as spam, with an SCL of 9 and a BCL of 7, resulting in it being sent to the Junk folder. We are not seeing this issue with Google's mail environment (being filtered to junk), confirmed that SPF, DMARC and DKIM are all correct and valid and that the domain and IP addresses are not on any block lists. If there is anyone from Microsoft around that can look into mail issues, could you please reach out to me off-list? Or if anyone has any ideas/suggestions as to how to resolve this, I'd be thankful to hear from you. Thanks, Christopher Hawker
