Forum Discussion
Proper whitelisting of microsoft.com on dnswl.org
Jamony, Thank you for your hints. Unfortunately, the use of dnswl.org was decided by my e-mail provider and the settings are out of my control. My expectation is that Microsoft maintains proper whitelisting in such widely-used services (obviously they used to do it initially).
Good for me: My e-mail provider has meanwhile changed the process and my individual problem is gone for now.
Hi VolkerM, for system-generated Microsoft 365 mail I would avoid trying to whitelist only by visible From address, because the actual sending infrastructure and envelope sender can vary. The better check is to review the message headers and confirm SPF, DKIM, DMARC, and the sending IP/range used for that exact message. If dnswl.org is involved on the receiving side, the receiving provider usually has to adjust their filtering logic or trust Microsoft's authenticated mail flow. On your side, make sure the reports are coming through Exchange Online normally and that no forwarding or connector is changing authentication results.
Jamony, Thank you for your hints. Unfortunately, the use of dnswl.org was decided by my e-mail provider and the settings are out of my control. My expectation is that Microsoft maintains proper whitelisting in such widely-used services (obviously they used to do it initially).
Good for me: My e-mail provider has meanwhile changed the process and my individual problem is gone for now.