[Fiware-acceleration-help] Returned mail: see transcript for details

[Mail Delivery Subsystem]

The original message was received at Fri, 6 Jul 2018 13:34:01 +0900
from [61.19.229.130]

   ----- The following addresses had permanent fatal errors -----
<kankoun at hiroshima-navi.or.jp>
    (reason: 553 5.3.0 <kankoun at hiroshima-navi.or.jp>... User unknown)

   ----- Transcript of session follows -----
... while talking to int-dns1.hiroshima-zaidan.ne.jp.:
>>> DATA
<<< 553 5.3.0 <kankoun at hiroshima-navi.or.jp>... User unknown
550 5.1.1 <kankoun at hiroshima-navi.or.jp>... User unknown
<<< 503 5.0.0 Need RCPT (recipient)
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