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Outlook add-in in C#: get message header?

Thornik asked:

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Hello, guys!
I cannot do simple stuff: get header of email! I wrote VSTO add-in in C# (VS2015) to target Outlook 2013. I can retrieve current message (and I have in hands MailItem object), but it has nothing corresponding to the raw header! I have a few "preparsed" fields inside MailItem interface, but they are useless - I need "Received-SPF" header!
MS again counts a whole world as stupids and "helps" us with ugliest solution they could create! Instead of providing simple Dictionary<string, string> they made "common used headers" as fields - whoa! And these dumbs study us how to program.... nonsense!

So short question: how to get a whole header from message?
Tags: C#, Outlook, AddIn


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