I have setup a website at www.xyz.com (not the real domain name) and I have created a user account for email@example.com I can send and receive email for this account fine. I created an email alias in ISPConfig for firstname.lastname@example.org (typed "smb" into the email alias field). I can't receive email for this alias, and when i attempt to send to email@example.com, my email bounces back with: Code: This is an automatically generated Delivery Status Notification Delivery to the following recipient failed permanently: firstname.lastname@example.org Technical details of permanent failure: PERM_FAILURE: SMTP Error (state 9): 550 <email@example.com>: Recipient address rejected: User unknown in local recipient table I checked my /etc/postfix/virtusertable file and I don't see "smb" anywhere in it. I assume this is where its supposed to be? What i do see for xyz.com is: Code: firstname.lastname@example.org web6_scott email@example.com web6_scott firstname.lastname@example.org web6_scott email@example.com web6_scott but no mention of my aliases. When I edit the record in ISPConfig, it does show "smb" in the Email Aliases field. What gives? Is it in another file?