Mail delivery failed: returning message to sender

Mail Delivery System Mailer-Daemon na
Pátek Říjen 8 03:10:31 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:

  alice.vavrova na
    SMTP error from remote mail server after RCPT TO:<alice.vavrova na>:
    host []: 554 5.7.1 <alice.vavrova na>:
    Recipient address rejected: Access denied, user does not exist

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