Actually I now know what is the problem.
The deferred queue was made of a lot of emails that obviously had to enter when the server was not configured correctly.
I did not noticed this in the beggining and postfix kept trying to send those spams ..
It was a lot of email ... something like +/-23000 emails!
My problem is that this server might go into a blacl list!
Anyway I overloaded
and has you suggested the most important :