posting a reply to a thread strangeness

[JD]

At 9:36 Mountain Standard Time, I posted a reply
to Bill ChuppinRe: Wodim unable to write on DL DVD Drive

I received a notification from gmail:

-------- Original Message --------
Subject: 	Delayed Mail (still being retried)
Date: 	Mon, 1 Apr 2013 00:41:20 -0400 (EDT)
From: 	MAILER-DAEMON at billmerriam.com (Mail Delivery System)
To: 	jd1008 at gmail.com


This is the mail system at host hecto.billmerriam.com.

####################################################################
# THIS IS A WARNING ONLY.  YOU DO NOT NEED TO RESEND YOUR MESSAGE. #
####################################################################

Your message could not be delivered for more than 1 hour(s).
It will be retried until it is 5 day(s) old.

For further assistance, please send mail to postmaster.

If you do so, please include this problem report. You can
delete your own text from the attached returned message.

                    The mail system

<lists at yocto.billmerriam.com>: temporary failure. Command output: now in
     mailfilter maildrop: error writing to mailbox. /usr/bin/maildrop: Unable to
     deliver to mailbox.

---------------------
  
So, has the ubuntu list been hacked?
Or what's causing this?