[sidr] Undelivered Mail Returned to Sender

MAILER-DAEMON@ietfa.amsl.com (Mail Delivery System) Fri, 20 December 2019 14:04 UTC

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Date: Fri, 20 Dec 2019 06:04:20 -0800
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Subject: [sidr] Undelivered Mail Returned to Sender
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<led.moon@signlikeme.com>: Host or domain name not found. Name service error
    for name=signlikeme.com type=AAAA: Host found but no data record of
    requested type
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