Returned mail: Data format error

[Post Office]

The original message was received at Tue, 13 Mar 2007 11:41:05 +0200
from linux.cz [149.90.10.176]

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

----- Transcript of session follows -----
... while talking to linux.cz.:
>>> MAIL From:"Post Office" <postmaster na linux.cz>
<<< 503 "Post Office" <postmaster na linux.cz>... Refused

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