Feedback Returned mail: Data format error

[x3enobody]

The original message was received at Mon, 2 Nov 2009 11:43:37 +0100
from flickr.com [47.15.189.108]

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<feedback@...>

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  while talking to ajax.dev.java.net.:
>>> MAIL From:x3enobody@...
<<< 501 x3enobody@...... Refused