Hello all. I'm running ISPConfig 3 on Ubuntu 10. I used the perfect setup tutorial to install the entire system. The problem I realized today is that mail sent to an alias domain (i.e. @somedomain forwards to @newsomedomain) is not blocked even though the recipient does not exist in the forwarded domain. Mail is rejected for unknown recipients in the real domain. No bounce message is generated though. Looking in the mail.log I see the mail to the invalid recipient being queued and delivered via maildrop. The problem is I need e-mail that is addressed to [email protected] to be rejected, if [email protected] does not exist. I have an upstream spam filter that is generating quarantines for invalid recipients because of this. Thanks for your help.