Returned mail: Data format error

Čtvrtek Únor 1 17:53:24 CET 2007

The original message was received at Thu, 1 Feb 2007 17:53:24 +0100
from linux.cz [155.3.230.114]

----- The following addresses had permanent fatal errors -----
sendmail na linux.cz

----- Transcript of session follows -----
... while talking to 81.220.249.210:
554 Service unavailable; [8.248.190.56] blocked using relays.osirusoft.com
Session aborted, reason: lost connection