Subject: Returned mail: Data format error

From: "Post Office" <[email-masked]>
Date: Thu, 29 Jul 2004 10:27:56 -0400

The original message was received at Thu, 29 Jul 2004 10:27:56 -0400
from 210.21.135.154

----- The following addresses had permanent fatal errors -----
<[email-masked]>

----- Transcript of session follows -----
... while talking to ietf.org.:
>>> DATA
<<< 400-aturner; %MAIL-E-OPENOUT, error opening !AS as output
<<< 400-aturner; -RMS-E-CRE, ACP file create failed
<<< 400