Mail delivery failed: returning message to sender

Mail Delivery System Mailer-Daemon na
Středa Srpen 25 07:36:19 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:

  cyza23 na
    SMTP error from remote mail server after RCPT TO:<cyza23 na>:
    host []: 550 5.1.1 <cyza23 na>:
    Recipient address rejected: User unknown in local recipient table

Další informace o konferenci Linux