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Hey,
Without seeing the exact log details it’s hard to say, but like you’ve seen it may not show all the details needed. Beyond making sure your rDNS/PTR, SPF, and DKIM are set, I’d recommend reaching out to Microsoft Sender Information.
Happy coding,
Jon Schwenn Platform Support Specialist DigitalOcean
Hello engineere866434
I see that this post is 2 years old, but i m facing the same issue now so i wanted to ask if you ever found a solution for this so i can give it a shot.