spammed by the same person for over three years using a Microsoft IP address

Because the sender is using Microsoft-hosted services, the only options are:

1. Continue reporting the messages to Microsoft
   • Use the official submission process so the messages are analyzed by Microsoft’s anti‑spam systems rather than only emailing abuse addresses.
   • Follow the guidance in Report messages and files to Microsoft to submit the spam directly from Outlook/Outlook.com. This feeds into Microsoft’s abuse and spam systems and can lead to blocking of the sender or their tenant.
   • For junk email originating from Exchange Online or Microsoft 365, see the “Abuse and spam reporting” sections and use the same reporting mechanism.
2. Work with the receiving provider (Rogers)
   • Ask Rogers to treat these messages as spam at their boundary (IP/domain block, content filter rule) based on the headers and sending IP/domain.
   • Rogers, as the mailbox provider, has the most direct control over what reaches the inbox, regardless of Microsoft’s actions.
3. Use local filtering and blocking
   • In Outlook, add the sender address and domain to the Blocked Senders list and mark each message as Junk. Over time this helps train filters.
   • If the sender changes addresses but uses the same pattern (subject, body, or domain), create Outlook rules to move or delete messages based on those patterns.
4. If messages are clearly abusive or unlawful
   • Continue to preserve full headers and content as evidence.
   • Follow the guidance under “Abuse and spam reporting” to ensure reports are properly submitted to Microsoft.
   • For serious threats or harassment, work with local law enforcement; Microsoft’s abuse team can act on confirmed violations of their policies, but legal enforcement is outside Microsoft’s scope.

There is no direct escalation path beyond the documented abuse/spam reporting and submissions process; Microsoft’s anti‑spam systems act based on volume and quality of reports, while the receiving provider and local Outlook rules provide immediate control over what is delivered or shown.

References:

• Microsoft 365 services for external email senders
• Reference: Policies, practices, and guidelines
• Frequently asked questions - Anti-spam protection