What's S.Colson's email?

["E.L. Willighagen" <egonw@sci.kun.nl>]

Can anyone supply me with a working email address of Stefaan Colson?
(Stefaan, i hope you will get this email personally...)

When i try stefaan.colson@pi.be, i get a permanent failure:

   ----- The following addresses had permanent fatal errors -----
<stefaan.colson@pi.be>

   ----- Transcript of session follows -----
... while talking to brussel-logical.planetinternet.be.:
>>> RCPT To:<stefaan.colson@pi.be>
<<< 550 <stefaan.colson@pi.be>... User unknown
550 <stefaan.colson@pi.be>... User unknown

Egon

Stefaan, that is why you did not receive my first email...