Because your mail server (ams8uucp0.ams.ops.eu.uu.net) is in ORBS, i.e.
it is an open mail relay, probably used before to relay spam. Read
http://www.orbs.org/ for instructions on how to get removed from ORBS.
Erik
> ---------- Forwarded message ----------
> Date: Fri, 18 May 2001 14:50:30 +0000
> From: The Post Office <postmaster@uucp.nl.uu.net>
> To: kees@schoen.nl
> Subject: Delivery reports about your email [FAILED(1)]
>
> This is a collection of reports about email delivery
> process concerning a message you originated.
>
> Some explanations/translations for these reports
> can be found at:
> http://www.zmailer.org/reports.html
>
> FAILED:
> Original Recipient:
> rfc822;alan@lxorguk.ukuu.org.uk
> Control data:
> smtp lxorguk.ukuu.org.uk alan@lxorguk.ukuu.org.uk 65534
> Diagnostic texts:
> ...\
> <<- MAIL From:<kees@schoen.nl> SIZE=10123
> ->> 250 <kees@schoen.nl> is syntactically correct
> <<- RCPT To:<alan@lxorguk.ukuu.org.uk>
> ->> 550-Open relay - see http://www.orbs.org/verify.php3?address=212.153.111.69
> ->> 550 mail from 212.153.111.69 rejected: administrative prohibition (host is blacklisted)
-- J.A.K. (Erik) Mouw, Information and Communication Theory Group, Department of Electrical Engineering, Faculty of Information Technology and Systems, Delft University of Technology, PO BOX 5031, 2600 GA Delft, The Netherlands Phone: +31-15-2783635 Fax: +31-15-2781843 Email: J.A.K.Mouw@its.tudelft.nl WWW: http://www-ict.its.tudelft.nl/~erik/ - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/