Returned mail: Data format error

[Bounced mail]

The original message was received at Mon, 29 Aug 2005 10:10:51 +0200 from linux.cz [58.198.62.19]

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

----- Transcript of session follows -----
... while talking to server 31.21.23.207:
554 5.0.0 Service unavailable; [181.245.163.181] blocked using relays.osirusoft.com
Session aborted