[Trhm-Go] Undelivered Mail Returned to Sender

[Mail Delivery System]

This is the mail system at host mail1.ans-com.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
delete your own text from the attached returned message.

                   The mail system

<dcontact at covinor.fr>: host 192.168.59.22[192.168.59.22] said: 550 5.1.1
    <dcontact at covinor.fr>: Recipient address rejected: User unknown in relay
    recipient table (in reply to RCPT TO command)
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