root@mail:~# host -t MX mail
mail has no MX record
root@mail:~# host -t MX mail.merrillpjensen.com
Host mail.merrillpjensen.com not found: 2(SERVFAIL)
root@mail:~# host -t MX merrillpjensen.com
Host merrillpjensen.com not found: 2(SERVFAIL)
 host -t MX fourth
;; connection timed out; no servers could be reached

root@mail:~#