[Octa-list] Undelivered Mail Returned to Sender

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Fri Sep 27 07:08:22 UTC 2019

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<octa-list at redhat.com>: host mx1.redhat.com[] said: 551 5.7.1 SPF
    fail: '[]'[], 'redhat.com'; REJECT (in reply to
    RCPT TO command)
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