Question and response
Question
dig cluster3.eu.messagelabs.com. MX
Answer
cluster3.eu.messagelabs.com. 60 MX 10 mail831.messagelabs.com.
cluster3.eu.messagelabs.com. 60 MX 10 mail833.messagelabs.com.
cluster3.eu.messagelabs.com. 60 MX 10 mail851.messagelabs.com.
cluster3.eu.messagelabs.com. 60 MX 10 mail857.messagelabs.com.
cluster3.eu.messagelabs.com. 60 MX 10 mail870.messagelabs.com.
cluster3.eu.messagelabs.com. 60 MX 10 mail877.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
mail831.messagelabs.com. 900 A 85.158.142.218
mail833.messagelabs.com. 900 A 85.158.142.209
mail851.messagelabs.com. 900 A 195.245.230.193
mail857.messagelabs.com. 900 A 195.245.230.199
mail870.messagelabs.com. 900 A 195.245.231.64
mail877.messagelabs.com. 900 A 195.245.231.73
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0