[opencms-dev] User unknown

[Stephan Hartmann]

Hello,

sending an email to contributions at opencms.com gives me following error 
message:

   ----- The following addresses had permanent fatal errors -----
<contributions at opencms.com>

   ----- Transcript of session follows -----
... while talking to mail.opencms.com.:
>>> RCPT To:<contributions at opencms.com>
<<< 550 <contributions at opencms.com>... User unknown
550 <contributions at opencms.com>... User unknown


What's wrong with it?

Greetings
Stephan