Returned mail: Data format error

[Post Office]

The original message was received at Sun, 14 May 2006 21:11:07 +0200 from [106.125.9.30]

----- The following addresses had permanent fatal errors -----
<databases na linux.cz>

----- Transcript of session follows -----
... while talking to 89.48.39.121:
554 Service unavailable; [198.193.25.167] blocked using relays.osirusoft.com, reason: Blocked
Session aborted