 smtp; 550 5.1.1 <bernartice@javornicko.cz>: Recipient address
    rejected: undeliverable address: host 10.3.13.225[10.3.13.225] said: 550
    5.1.1 <bernartice@javornicko.cz> User doesn't exist:
    bernartice@javornicko.cz (in reply to RCPT TO command)
