This is what part of the email header looks like, I replaced the email addresses with *********
Microsoft SMTP Server (version=TLS1_2,
cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384) id 15.2.1118.26; Wed, 27 Nov
2024 13:39:33 +0100
Message-ID: 1694702D-7657-480F-AF55-967C2D1C6676dok@*****************
MIME-Version: 1.0
From: *********************
To: ********************
Date: Wed, 27 Nov 2024 13:39:33 +0100
Subject: =?utf-8?B?SERGRSA3NDkxOTk3IC8gV08tMDI4MjA0MjIyIE90cnp5bWHF?=
=?utf-8?B?gmXFmyBub3dlIHphZGFuaWUgdHlwdSBQcnp5ZHppZWxlbmllIHByYWNv?=
=?utf-8?B?d25pa2E=?=
Content-Type: multipart/mixed;
boundary="--boundary_206179_2f0b1fdc-1951-43ad-b2b3-1aa031d663a9"
The encoding in the email program is correct.