Undelivered Mail Returned to Sender

[Mail Delivery System]

This is the mail system at host mr06.melco.co.jp.

I'm sorry to have to inform you that your message could not
be delivered to one or more recipients. It's attached below.

For further assistance, please send mail to postmaster.

If you do so, please include this problem report. You can
delete your own text from the attached returned message.

                   The mail system

<ueyama-siniti at melsc.jp>: host
    mitsubishielectricgroup-mail-onmicrosoft-com.mail.protection.outlook.com[104.47.92.36]
    said: 554 5.4.12 SMTP; Hop count exceeded - possible mail loop detected on
    message id <004d01d7244e$04c60ec8$01b49fb3$@debian.cz>
    [OS2JPN01FT013.eop-JPN01.prod.protection.outlook.com] (in reply to end of
    DATA command)
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From: "ueyama-siniti at melsc.jp" <czdebian-l at debian.cz>
Subject: [SPAM] Re:Bitcoin Investment
Date: 28 Mar 2021 23:34:24 -0400
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URL: <http://www.debian.cz/pipermail/czdebian-l/attachments/20210329/7b18b318/attachment-0001.eml>