5 exim -d-all+dns -bt dnslookup@mx46.test.ex \
10 exim -DD6=disable_ipv6 -d-all+dns -bt dnslookup@mx46.test.ex \
14 exim -DSERVER=server -bd -oX PORT_D
16 client HOSTIPV6 PORT_D
22 exim -DSERVER=server -DD6=disable_ipv6 -bd -oX PORT_D
25 client HOSTIPV6 PORT_D