Topic: Mail problem

[srossbach]

I have the problem that I can send mail from outside only to existing users on the SME 6.0.1 box. This means if I sent for example to name.name@mydomain.xxx and name.name doesn't exist the sender recieves the following message

"553 Sorry, that is an invalid e-mail address"

, the same problem if I try to send mail from an existing account.

In short:

Rec. mail user exist         no problem
          user doesn't exist error 553

send mail always error 553

Any sugestions?

Stefan