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:

  broklyn40 na volny.cz
    SMTP error from remote mail server after RCPT TO:<broklyn40 na volny.cz>:
    host ccx.spamfree.cz [195.24.76.171]: 554 5.7.1 <broklyn40 na volny.cz>:
    Recipient address rejected: Access denied, user does not exist
  matousek5 na atlas.cz
    SMTP error from remote mail server after RCPT TO:<matousek5 na atlas.cz>:
    host cax.virusfree.cz [31.7.241.25]: 554 5.7.1 <matousek5 na atlas.cz>:
    Recipient address rejected: Access denied, user does not exist
  jidelnikritik na seznam.cz
    SMTP error from remote mail server after RCPT TO:<jidelnikritik na seznam.cz>:
    host mx1.seznam.cz [77.75.78.42]: 550 5.1.1 Sorry, no mailbox here by that name.
  chasborodezo na seznam.cz
    SMTP error from remote mail server after RCPT TO:<chasborodezo na seznam.cz>:
    host mx1.seznam.cz [77.75.78.42]: 550 5.1.1 Sorry, no mailbox here by that name.
  kabul007 na email.cz
    SMTP error from remote mail server after RCPT TO:<kabul007 na email.cz>:
    host mx1.seznam.cz [77.75.78.42]: 550 5.1.1 Sorry, no mailbox here by that name.
  apollo23 na email.cz
    SMTP error from remote mail server after RCPT TO:<apollo23 na email.cz>:
    host mx1.seznam.cz [77.75.78.42]: 550 5.1.1 Sorry, no mailbox here by that name.
  jiristrelecky na seznam.cz
    SMTP error from remote mail server after RCPT TO:<jiristrelecky na seznam.cz>:
    host mx1.seznam.cz [77.75.78.42]: 550 5.1.1 Sorry, no mailbox here by that name.
  tomaspinqee na seznam.cz
    SMTP error from remote mail server after RCPT TO:<tomaspinqee na seznam.cz>:
    host mx1.seznam.cz [77.75.78.42]: 550 5.1.1 Sorry, no mailbox here by that name.
  sexysexysexysexysexysexy na seznam.cz
    SMTP error from remote mail server after RCPT TO:<sexysexysexysexysexysexy na seznam.cz>:
    host mx1.seznam.cz [77.75.78.42]: 550 5.1.1 Sorry, no mailbox here by that name.