This page is for configuring email-related settings for a virtual server. If your system supports BCCing sent email (and it is enabled on the Module Config page), the BCC outgoing email to section can be used to select an address to copy mail to.

If the virtual server is an alias domain, the Mail aliases mode field controls if mail aliases are copied from the target domain, or if a single catchall alias is created to forward all email to the target. The former mode is not available with all mail servers, but is superior when using Postfix as it allows mail to invalid addresses to be bounced at the SMTP conversation level.