Mail / can't disable the "catchall"

[roberto@]

I set the domain admin panel to reject emails sent to invalid addressess like [email protected] but the feature is not working.
Please advise

 

[phoenixisp]

I've had nothing but trouble with the "Reject" function. What I do is create an email account with no mailbox and no redirect. Then instead of rejecting these messages, forward them to your new black hole account. They'll just go away quietly.