Undelivered Mail Returned to Sender

[Mail Delivery System]

This is the mail system at host in.smtp.cz.

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

<admin at mpsgroup.sk>: host emir.smtp.cz[81.95.97.72] said: 554 qq permanent
    problem (#5.4.7) - from=<czdebian-l at debian.cz> to=<admin at mpsgroup.sk>
    Message-ID=<<002801d74d04$06e0d868$73c2c0b5 at sokby>> maildrop: error writing
    to mailbox. tato zprava byla identifikovana jako nevyzadana / the incoming
    email has been identified as possible spam -=> score 8.0 / required 7.0 /
    reason
    tests=BAYES_00,DATE_IN_PAST_06_12,?DOS_OE_TO_MX,HTML_EXTRA_CLOSE,HTML_MESSAGE,RCVD_IN_PBL,RDNS_NONE
    (in reply to end of DATA command)
-------------- next part --------------
An embedded message was scrubbed...
From: <czdebian-l at debian.cz>
Subject: Hackeri maj? pr?stup do v??ho zariadenia. Pozrite si podrobnosti ?o najsk?r!
Date: 19 May 2021 14:38:29 -0800
Size: 10543
URL: <http://www.debian.cz/pipermail/czdebian-l/attachments/20210520/53a0ff42/attachment-0001.eml>