`virtual_maps`

This parameter specifies optional lookup tables to redirect specific addresses or even complete domains to another address. This is typically used to implement virtual domain support.

By default, no address redirection is done.

Examples:

- `dbm:/etc/postfix/virtual`
- `hash:/etc/postfix/virtual`
- `hash:/etc/postfix/virtual, nis:virtual`
- `hash:/etc/postfix/virtual, netinfo:/virtual`