Postfix/main.cf/virtual transport


 * parameter: virtual_transport
 * default: virtual
 * versions: 2.0 and later

About
The default mail delivery transport and next-hop destination for final delivery to domains listed with $virtual_mailbox_domains. This information can be overruled with the transport(5) table.

Specify a string of the form transport:nexthop, where transport is the name of a mail delivery transport defined in master.cf. The :nexthop destination is optional; its syntax is documented in the manual page of the corresponding delivery agent.