I've encountered a 3-part message with the following header:

X-MimeOLE: Produced By Microsoft Exchange V6.5.7226.0

The message comprises 3 parts: A "look at this" message (text/plain, UTF-8), another message being forwarded (text/html, ISO-2022-jp), and a corporate disclaimer (text/plain, no charset specified). The package is sent within a multipart/alternative, which says that all 3 parts are supposed to be same content with different degrees of richness, best last, so Mozilla Thunderbird displays only the disclaimer. It lacks a UI to select other alternatives, so it's impossible to see the real meat of the message.

First, has anyone else seen this brain damage? Is it due to an Exchange misconfiguration? (Ie. can I recommend a specific action to the sender's IT department, short of replacing Exchange?)

Second, is it reasonable to fix this in MD by replacing multipart/alternative with multipart/mixed in the outermost Content-Type header?
_______________________________________________
NOTE: If there is a disclaimer or other legal boilerplate in the above
message, it is NULL AND VOID.  You may ignore it.

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