A drawback of sending mail as "user@example.com" (instead of
"user@hostname.example.com") is that mail for "root" and other
system accounts is also sent to the central mailhost. In order to
deliver such accounts locally, you can set up virtual aliases as
follows:
1 /etc/postfix/
main.cf:
2
virtual_alias_maps = hash:/etc/postfix/virtual
3
4 /etc/postfix/
virtual:
5 root root@localhost
6 . . .
Translation: