Mail delivery failed: returning message to sender
Mail Delivery System
Mailer-Daemon na orange.es
Středa Říjen 6 01:12:17 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:
david.ubl na ceskapojistovna.cz
SMTP error from remote mail server after RCPT TO:<david.ubl na ceskapojistovna.cz>:
host mxa-00181b01.gslb.pphosted.com [185.183.28.5]:
550 5.1.1 User Unknown
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