Hacker III "Haystack" Mystery Cache

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May 2021 18:17:37 +0200 (CEST)
Received: from mail.protonmail.ch ([185.70.41.101])
From: N19H70WL <n19h70wl@protonmail.ch>
Date: Thu, 11 May 2021 18:17:28 +0200
Message-ID: <hL16bWs2AJRP4NZmq5Fz2QBQ84yfvuNREdF5DrF2XZvn0LJaIIlASw@mail.protonmail.ch>
Subject: Finding Robot
To: teambirdyblack@telenet.be
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Check your solution

Real hacking is illegal and is not needed to crack this mystery.
You do not need to install any tools or download ZIP or EXE files.
To follow the story, take on the mysteries of this series in the order given.
This may at times be required because prior knowledge may be needed.