weird evolution problem

[Gerhard Magnus]

I was so ticked off writing a Letter to the Editor that I gave the wrong
address, i.e. one without an "@" sign.  Maybe it serves me right, but
now I can't get rid of the message -- it's not in Drafts, Junk or Sent
or any of the other evolution folders.  But now each time I hit
send/receive evolution tries sending it again and I get "Error while
performing operation. sendmail exited with status 67: mail not sent."

Then the message is bounced back to me with this error:

The original message was received at Sun, 12 Aug 2007 15:18:25 -0700
from magnusg at localhost

   ----- The following addresses had permanent fatal errors -----
news.Oregonian.com
    (reason: 550 5.1.1 <news.Oregonian.com at PuteB.SMAssociates.com>...
User unknown)
    (expanded from: news.Oregonian.com)

How do I get rid of it?

Thanks for the help.  --Jerry