Mail delivery failed: returning message to sender

[Mail Delivery System]

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:

  originalplus na seznam.cz
    SMTP error from remote mail server after RCPT TO:<originalplus na seznam.cz>:
    host mx1.seznam.cz [77.75.76.42]: 550 5.1.1 Sorry, no mailbox here by that name.
  mfet na seznam.cz
    SMTP error from remote mail server after RCPT TO:<mfet na seznam.cz>:
    host mx1.seznam.cz [77.75.76.42]: 550 5.1.1 Sorry, no mailbox here by that name.
  pavlik2007 na seznam.cz
    SMTP error from remote mail server after RCPT TO:<pavlik2007 na seznam.cz>:
    host mx1.seznam.cz [77.75.76.42]: 550 5.1.1 Sorry, no mailbox here by that name.
  nasratvoee na seznam.cz
    SMTP error from remote mail server after RCPT TO:<nasratvoee na seznam.cz>:
    host mx1.seznam.cz [77.75.76.42]: 550 5.1.1 Sorry, no mailbox here by that name.
  1992olda na seznam.cz
    SMTP error from remote mail server after RCPT TO:<1992olda na seznam.cz>:
    host mx1.seznam.cz [77.75.76.42]: 550 5.1.1 Sorry, no mailbox here by that name.
  svud.1i3xi0 na seznam.cz
    SMTP error from remote mail server after RCPT TO:<svud.1i3xi0 na seznam.cz>:
    host mx1.seznam.cz [77.75.76.42]: 550 5.1.1 Sorry, no mailbox here by that name.
  privat99 na seznam.cz
    SMTP error from remote mail server after RCPT TO:<privat99 na seznam.cz>:
    host mx1.seznam.cz [77.75.76.42]: 550 5.1.1 Sorry, no mailbox here by that name.
  vyreseni.dluhu na seznam.cz
    SMTP error from remote mail server after RCPT TO:<vyreseni.dluhu na seznam.cz>:
    host mx1.seznam.cz [77.75.76.42]: 550 5.1.1 Sorry, no mailbox here by that name.
  xmichalx19 na seznam.cz
    SMTP error from remote mail server after RCPT TO:<xmichalx19 na seznam.cz>:
    host mx1.seznam.cz [77.75.76.42]: 550 5.1.1 Sorry, no mailbox here by that name.