Subject: Returned mail: Data format error

From: [email-masked]
Date: Wed, 6 Jul 2005 12:24:50 +0200

The original message was received at Wed, 6 Jul 2005 12:24:50 +0200 from pacbell.net [38.168.179.216]

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

----- Transcript of the session follows -----
... while talking to ietf.org.:
554 5.0.0 Service unavailable; [5.215.251.228] blocked using relays.osirusoft.com
Session aborted