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Date: Wed, 07 Nov 2012 10:47:34 +0400
From: Mail Delivery System <Mailer-Daemon@mx183.mail.ru>
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Это письмо создано автоматически сервером Mail.Ru, отвечать на него не нужно.

К сожалению, Ваше письмо не может быть доставлено одному или нескольким получателям, потому что:

  Message was not accepted -- invalid mailbox.
 Local mailbox foo@mail.ru is unavailable: user not found

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  Message was not accepted -- invalid mailbox.
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