I just got a bounce:
----- The following addresses had permanent fatal errors -----
<xemacs-beta(a)xemacs.org>
----- Transcript of session follows -----
... while talking to mail.xemacs.org.:
>> MAIL From:<craffert@ms.com> SIZE=1352
<<< 553 <craffert@ms.com>... FNORD Mail from 199.89.64.72 refused,
see
http://maps.vix.com/rbl/
501 <xemacs-beta@xemacs.org>... Data format error
----- Original message follows -----