Mail delivery failed: returning message to sender

Mail Delivery System Mailer-Daemon na orange.es
Neděle Srpen 22 07:18:30 CEST 2021


This message was created automatically by mail delivery software.

A message that you sent could not be delivered to one or more of its
recipients. This is a permanent error. The following address(es) failed:

  jan.saf na jen.cz
    SMTP error from remote mail server after RCPT TO:<jan.saf na jen.cz>:
    host mail.jen.cz [185.67.189.19]: 550 5.1.1 <jan.saf na jen.cz>:
    Recipient address rejected: User unknown in virtual mailbox table



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