[Tulungan] Undeliverable mail ( Сообщение не доставлено ): Коммуникации на даче

[MAILER-DAEMON at cgp.dol.ru]

Failed to deliver to '<bob at gdbrus.dol.ru>' (Невозможно доставить письмо <bob at gdbrus.dol.ru>)
SMTP module(domain @194.87.5.27:gdbrus.aha.ru) reports:
 host name is unknown

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