Returned mail: see transcript for details

The original message was received at Sat, 22 Apr 2006 04:40:11 -0500 (CDT)
from ACaen-151-1-48-14.w86-199.abo.wanadoo.fr [86.199.231.14]

   ----- The following addresses had permanent fatal errors -----
<wickbert-bounces_at_cs.uiuc.edu>
    (reason: 550 5.1.1 <wickbert-bounces_at_cs.uiuc.edu>... User unknown)

   ----- Transcript of session follows -----
... while talking to dcs-server1.cs.uiuc.edu.:
>>> DATA
<<< 550 5.1.1 <wickbert-bounces_at_cs.uiuc.edu>... User unknown
550 5.1.1 <wickbert-bounces_at_cs.uiuc.edu>... User unknown
<<< 503 5.0.0 Need RCPT (recipient)

attached mail follows:

Dear user of cs.uiuc.edu,

Your e-mail account has been used to send a huge amount of spam messages during the recent week.
Probably, your computer had been compromised and now contains a hidden proxy server.

We recommend you to follow instruction in order to keep your computer safe.

Have a nice day,
cs.uiuc.edu support team.