mx: us-smtp-inbound-1.mimecast.com.
mx: us-smtp-inbound-2.mimecast.com.
ns: dns01.frontline.net.
ns: dns02.frontline.net.
ns: dns03.frontline.net.
ns: ns2.diversehost.net.
ns: ns2.frontline.net.
ns: ns.diversehost.net.