lookuphost:
#driver = dnslookup #remark or del src driver on line
driver = manualroute #add this powerful driver
domains = ! +local_domains
ignore_target_hosts = 127.0.0.0/8
route_list = * smtp.whatyouwant.com #add this and just modify smtp.whatyouwant.com
condition = "${perl{check_limits}}"
transport = remote_smtp
no_more
#all done