Question and response
Question
dig cluster6a.eu.messagelabs.com. MX
Answer
cluster6a.eu.messagelabs.com. 60 MX 10 mail834.messagelabs.com.
cluster6a.eu.messagelabs.com. 60 MX 10 mail838.messagelabs.com.
cluster6a.eu.messagelabs.com. 60 MX 10 mail839.messagelabs.com.
cluster6a.eu.messagelabs.com. 60 MX 10 mail858.messagelabs.com.
cluster6a.eu.messagelabs.com. 60 MX 10 mail859.messagelabs.com.
cluster6a.eu.messagelabs.com. 60 MX 10 mail874.messagelabs.com.
cluster6a.eu.messagelabs.com. 60 MX 10 mail876.messagelabs.com.
cluster6a.eu.messagelabs.com. 60 MX 10 mail879.messagelabs.com.
Authority
messagelabs.com. 180 NS ns-1296.awsdns-34.org.
messagelabs.com. 180 NS ns-1714.awsdns-22.co.uk.
messagelabs.com. 180 NS ns-453.awsdns-56.com.
messagelabs.com. 180 NS ns-520.awsdns-01.net.
Additional
mail834.messagelabs.com. 900 A 85.158.142.210
mail838.messagelabs.com. 900 A 85.158.142.214
mail839.messagelabs.com. 900 A 85.158.142.215
mail858.messagelabs.com. 900 A 195.245.230.200
mail859.messagelabs.com. 900 A 195.245.230.201
mail874.messagelabs.com. 900 A 195.245.231.69
mail876.messagelabs.com. 900 A 195.245.231.72
mail879.messagelabs.com. 900 A 195.245.231.75
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0