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:

  fildas.jezek na seznam.cz
    SMTP error from remote mail server after RCPT TO:<fildas.jezek na seznam.cz>:
    host mx1.seznam.cz [77.75.76.42]: 550 5.1.1 Sorry, no mailbox here by that name.
  hanis15900 na seznam.cz
    SMTP error from remote mail server after RCPT TO:<hanis15900 na seznam.cz>:
    host mx1.seznam.cz [77.75.76.42]: 550 5.1.1 Sorry, no mailbox here by that name.
  martina.dvorackova na seznam.cz
    SMTP error from remote mail server after RCPT TO:<martina.dvorackova na seznam.cz>:
    host mx1.seznam.cz [77.75.76.42]: 550 5.1.1 Sorry, no mailbox here by that name.
  kvasula na email.cz
    SMTP error from remote mail server after RCPT TO:<kvasula na email.cz>:
    host mx1.seznam.cz [77.75.76.42]: 550 5.1.1 Sorry, no mailbox here by that name.
  kjub na seznam.cz
    SMTP error from remote mail server after RCPT TO:<kjub na seznam.cz>:
    host mx1.seznam.cz [77.75.76.42]: 550 5.1.1 Sorry, no mailbox here by that name.
  wildcat.love na seznam.cz
    SMTP error from remote mail server after RCPT TO:<wildcat.love na seznam.cz>:
    host mx1.seznam.cz [77.75.76.42]: 550 5.1.1 Sorry, no mailbox here by that name.
  pizzeriaprest na seznam.cz
    SMTP error from remote mail server after RCPT TO:<pizzeriaprest na seznam.cz>:
    host mx1.seznam.cz [77.75.76.42]: 550 5.1.1 Sorry, no mailbox here by that name.
  burac na seznam.cz
    SMTP error from remote mail server after RCPT TO:<burac na seznam.cz>:
    host mx1.seznam.cz [77.75.76.42]: 550 5.1.1 Sorry, no mailbox here by that name.
  udelejme na seznam.cz
    SMTP error from remote mail server after RCPT TO:<udelejme na seznam.cz>:
    host mx1.seznam.cz [77.75.76.42]: 550 5.1.1 Sorry, no mailbox here by that name.
  freemaster na volny.cz
    SMTP error from remote mail server after RCPT TO:<freemaster na volny.cz>:
    host cbx.virusfree.cz [31.7.241.26]: 554 5.7.1 <freemaster na volny.cz>:
    Recipient address rejected: Access denied, user does not exist
  wqew na xfsd.cz
    Unrouteable address