Message could not be delivered

[The Post Office]

The original message was received at Fri, 23 Feb 2007 12:25:10 +0100 from linux.cz [156.174.221.53]

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

----- Transcript of session follows -----
... while talking to host 208.226.149.30:
554 <redhat-cz na linux.cz>... Message is too large
554 <redhat-cz na linux.cz>... Service unavailable