Mail System Error - Returned Mail

[Post Office]

The original message was received at Thu, 6 Jul 2006 19:10:47 +0800 from linux.cz [17.192.200.246]

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

----- Transcript of the session follows -----
... while talking to 153.221.181.91:
554 5.0.0 Service unavailable; [81.253.142.226] blocked using relays.osirusoft.com, reason: Blocked
Session aborted, reason: lost connection