Was bedeutet dieser Hinweis? "IP address is in the SpamCop database, bye (in reply to RCPT TO command)"

5 years ago

IP address is in the SpamCop database, bye (in reply to RCPT TO
    command)

 Ich erhalte diese Nachricht nach Versendung einer E-Mail immer an denselben Empfänger. Wie kann ich die "Nichtzustellung" beheben?

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