Undelivered Mail Returned to Sender

[Mail Delivery System]

This is the mail system at host 122758jszsoft.net.

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
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                   The mail system

<117280858 at qq.com>: host mx3.qq.com[203.205.219.57] said: 550 Domain may not
    exist or DNS check failed
    [NXQM0+hDrmr5NOCE7K1bV/1PcEGxW7K3Xx4X3T+QF4unLScy7mpJVEw= IP:
    192.255.234.25]. (in reply to end of DATA command)
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