[Users] S/MIME signed message shown with attachment in Outlook and OWA

[Marco Moock]

Hello!

messages sent with S/MIME signature from Claws Mail are shown with
attachment symbol in Outlook OWA and desktop Outlook.

Such a message is attached to that mail.

Claws Mail and Thunderbird show them without the paperclip symbol.

What is the reason for that behaviour?

-- 
kind regards
Marco
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From: Marco Moock <marco.moock at urz.uni-heidelberg.de>
Subject: test9000
Date: Mon, 4 Dec 2023 12:11:37 +0100
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