（下記が、そのエラーメッセージとなります。）
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This is the Postfix program at host mail.shinobi.jp.
I'm sorry to have to inform you that your message could not be
be delivered to one or more recipients. It's attached below.
For further assistance, please send mail to <postmaster>
If you do so, please include this problem report. You can
delete your own text from the attached returned message.
The Postfix program
<（お客様のメールアドレス）>: host c2mailmx.mailcentro.com[207.183.238.22] said: 551
5.7.1 REFUSED: Your message has been blocked on server c2mailmx101 by our
SPAM filter pattern (s25928320). Please forward this message along with the
original email to FilterSupport@MailCentro.com. (in reply to end of DATA
command)
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観光客の舟とすれ違う