Hi Stefano,
I see you and I have had the same experience with Outlook's support : answers are based on a scenario that always ends the same way. I share your issues : IPs that are working well are green on SNDS and other IPs that are consecutive and sending the exact same emails get throttled in my case... I do not see any logic in this. Also, I still get some "server busy" messages from Outlook, that was never the case before. Mathieu.
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