I have setup a website at www.xyz.com (not the real domain name) and I have created a user account for [email protected] I can send and receive email for this account fine. I created an email alias in ISPConfig for [email protected] (typed "smb" into the email alias field). I can't receive email for this alias, and when i attempt to send to [email protected], my email bounces back with: Code: This is an automatically generated Delivery Status Notification Delivery to the following recipient failed permanently: [email protected] Technical details of permanent failure: PERM_FAILURE: SMTP Error (state 9): 550 <[email protected]>: 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: [email protected] web6_scott [email protected] web6_scott [email protected] web6_scott [email protected] 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?