Returned mail: see transcript for details

Mon Mar 29 15:28:02 CEST 2021

The original message was received at Mon, 29 Mar 2021 22:28:01 +0900 (JST)
from localhost [127.0.0.1]

   ----- The following addresses had permanent fatal errors -----
<okazaki-de-iikana.0520 at docomo.ne.jp>
    (reason: 550 Unknown user okazaki-de-iikana.0520 at docomo.ne.jp)

   ----- Transcript of session follows -----
... while talking to mfsmax.docomo.ne.jp.:
>>> RCPT To:<okazaki-de-iikana.0520 at docomo.ne.jp>
<<< 550 Unknown user okazaki-de-iikana.0520 at docomo.ne.jp
550 5.1.1 <okazaki-de-iikana.0520 at docomo.ne.jp>... User unknown
>>> DATA
<<< 503 Bad sequence of commands
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