Hello, We're seeing some odd behavior where, when a transport rule at Microsoft's email offerings passes along the message, sometimes it is stripping off the typical MIME preamble:
This is a multi-part message in MIME format If there is a DKIM signature, that then no longer matches, which is a tad problematic. Question now is 1. Have others here noticed this behavior (a.k.a we're not crazy, or at least not very), and 2. Maybe even know of a way to avoid it, that we can pass along, or even better, 3. Is anyone from Microsoft reading this that could make a difference in getting this (bug, I assume) fixed? Thanks in advance, Erwin Cover the blind spots in your cybersecurity. Check out Barracuda Managed XDR <https://www.barracuda.com/products/managed-xdr?utm_medium=signature&utm_source=signature&utm_campaign=xdr_sign&utm_content=cover-the-blind-spots+> DISCLAIMER: This e-mail and any attachments to it contain confidential and proprietary material of Barracuda, its affiliates or agents, and is solely for the use of the intended recipient. Any review, use, disclosure, distribution or copying of this transmittal is prohibited except by or on behalf of the intended recipient. If you have received this transmittal in error, please notify the sender and destroy this e-mail and any attachments and all copies, whether electronic or printed.
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