[BlueOnyx:05581] Sending mail from the webmail : bad sender address

[Soyer Frank]

Hi again, all ;))

Now the mail works on my BlueOnyx, but I notice a problem with the webmail :
when sending or responding to a mail from the webmail, the sender 
address contains the server name, not the domain of the virtualhost.

Like :
Domain / virtualhost = ouestelkeum.com,
Sender connected to BlueOnyx with his account,
The mail he sends arrives with "sender at server.systea.net" which is the 
BlueOnyx server name,
But the user is receiving mails at sender at ouestlekeum.com, no doubt 
(know this part works !)

How can I force it to use the domain name of the virtualhost ?

Frank