*** ATTENTION ***

Your e-mail is being returned to you because there was a problem with its
delivery. The reason your mail is being returned to you is listed in the
section labeled: "----- The delivery status notification errors -----".

The line beginning with "Diagnostic-Code:" describes the specific reason
your e-mail could not be delivered.  The following lines contains the
RFC822 header of the original email message.

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----- The delivery status notification errors -----


<annouce@mail.cvcbike.org>: host mail.cvcbike.org[205.147.16.135] said: 550
    5.1.1 <annouce@mail.cvcbike.org>: Recipient address rejected: User unknown
    in local recipient table (in reply to RCPT TO command)