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:

  wooden na hu.cz
    SMTP error from remote mail server after RCPT TO:<wooden na hu.cz>:
    host mail.hu.cz [88.86.100.181]: 554 5.7.1 Service unavailable; Client host [62.36.20.214] blocked using b.barracudacentral.org; http://www.barracudanetworks.com/reputation/?pr=1&ip=62.36.20.214
  rebiusnoir na seznam.cz
    SMTP error from remote mail server after RCPT TO:<rebiusnoir na seznam.cz>:
    host mx1.seznam.cz [77.75.78.42]: 550 5.1.1 Sorry, no mailbox here by that name.
  juki8 na seznam.cz
    SMTP error from remote mail server after RCPT TO:<juki8 na seznam.cz>:
    host mx1.seznam.cz [77.75.78.42]: 550 5.1.1 Sorry, no mailbox here by that name.
  cake1 na seznam.cz
    SMTP error from remote mail server after RCPT TO:<cake1 na seznam.cz>:
    host mx1.seznam.cz [77.75.78.42]: 550 5.1.1 Sorry, no mailbox here by that name.
  ph.ph na email.cz
    SMTP error from remote mail server after RCPT TO:<ph.ph na email.cz>:
    host mx1.seznam.cz [77.75.78.42]: 550 5.1.1 Sorry, no mailbox here by that name.
  furmic na seznam.cz
    SMTP error from remote mail server after RCPT TO:<furmic na seznam.cz>:
    host mx1.seznam.cz [77.75.78.42]: 550 5.1.1 Sorry, no mailbox here by that name.
  martin.laty na seznam.cz
    SMTP error from remote mail server after RCPT TO:<martin.laty na seznam.cz>:
    host mx1.seznam.cz [77.75.78.42]: 550 5.1.1 Sorry, no mailbox here by that name.