[DML] Is anyone else getting these error messages?

["Farrar Hudkins" <fhudkins@xxxxxxxxx>]

For the last few days I've received the following message after
posting to the DML:

The original message was received at 2008-02-18 15:01:42 +0900
from postoffice.local [10.0.0.1]

  ----- The following addresses had permanent fatal errors -----
<momoko@xxxxxx>

  -----Transcript of session follows -----
... while talking to postoffice.local.:
>>> RCPT To:<momoko@xxxxxx>
<<< 550 5.1.1 unknown or illegal alias: momoko@xxxxxx
550 <momoko@xxxxxx>... User unknown


Final-Recipient: RFC822; momoko@xxxxxx
Action: failed
Status: 5.1.1
Remote-MTA: DNS; postoffice.local
Diagnostic-Code: SMTP;550 5.1.1 unknown or illegal alias: momoko@xxxxxx
Last-Attempt-Date: 2008-02-18 15:01:42 +0900



Any clues?

Farrar Hudkins
#2613 (auto)


To address comments privately to the moderating team, please address:
moderators@xxxxxxxxxxx

For more info on the list, tech articles, cars for sale see www.dmcnews.com

To search the archives or view files, log in at http://groups.yahoo.com/group/dmcnews 
Yahoo! Groups Links

<*> To visit your group on the web, go to:
    http://groups.yahoo.com/group/dmcnews/

<*> Your email settings:
    Individual Email | Traditional

<*> To change settings online go to:
    http://groups.yahoo.com/group/dmcnews/join
    (Yahoo! ID required)

<*> To change settings via email:
    mailto:dmcnews-digest@xxxxxxxxxxxxxxx 
    mailto:dmcnews-fullfeatured@xxxxxxxxxxxxxxx

<*> To unsubscribe from this group, send an email to:
    dmcnews-unsubscribe@xxxxxxxxxxxxxxx

<*> Your use of Yahoo! Groups is subject to:
    http://docs.yahoo.com/info/terms/