[vi main.cf]
transport_maps = hash:/etc/postfix/transport
[vi transport]
ASPMX.L.GOOGLE.COM smtp:[168.95.4.10]
yahoo.com.tw smtp:[168.95.4.10]
pchome.com.tw smtp:[168.95.4.10]
yahoo.com smtp:[168.95.4.10]
wes.com.tw smtp:[168.95.4.10]
gmail.com smtp:[168.95.4.10]
eversuper.com.tw smtp:[168.95.4.10]
hostmail.com smtp:[168.95.4.10]
msn.com smtp:[168.95.4.10]
[transport.db]
postmap transport