2606:4700:4400::6812:2136
2606:4700:4400::ac40:9aca

mx: cluster6a.us.messagelabs.com.
mx: cluster6.us.messagelabs.com.
ns: deb.ns.cloudflare.com.
ns: rob.ns.cloudflare.com.

2606:4700::6810:b954
2606:4700::6812:6e41

mx: cluster6a.us.messagelabs.com.
mx: cluster6.us.messagelabs.com.
ns: deb.ns.cloudflare.com.
ns: rob.ns.cloudflare.com.

2606:4700::6813:9e49
2606:4700::6813:9f49

mx: cluster6a.us.messagelabs.com.
mx: cluster6.us.messagelabs.com.
ns: deb.ns.cloudflare.com.
ns: rob.ns.cloudflare.com.