Support is ending for Windows Mail
Support for Windows Mail will end on December 31, 2024. After December 31, 2024, users will no longer be able to send and receive email using Windows Mail.
Outlook for Windows: The Future of Mail, Calendar, and People on Windows 11 (Microsoft)
You should use Webmail or other email software in the future. If you are using Windows Mail such as Keio Mail (@keio.jp mail), please use Webmail or other mail software or applications from now on.
Reference site about Keio Mail:
Last-Modified: December 26, 2024
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