Question and response
Question
dig us-smtp-o365-outbound-2.mimecast.com. A
Answer
us-smtp-o365-outbound-2.mimecast.com. 300 A 170.10.128.225
us-smtp-o365-outbound-2.mimecast.com. 300 A 170.10.132.144
us-smtp-o365-outbound-2.mimecast.com. 300 A 170.10.128.144
us-smtp-o365-outbound-2.mimecast.com. 300 A 170.10.132.245
us-smtp-o365-outbound-2.mimecast.com. 300 A 170.10.132.225
us-smtp-o365-outbound-2.mimecast.com. 300 A 170.10.128.245
Authority
mimecast.com. 86400 NS dns01.mimecast.net.
mimecast.com. 86400 NS dns03.mimecast.net.
mimecast.com. 86400 NS dns02.mimecast.net.
mimecast.com. 86400 NS dns04.mimecast.net.
Additional
dns01.mimecast.net. 300 A 185.58.87.12
dns02.mimecast.net. 300 A 205.139.110.125
dns03.mimecast.net. 300 A 195.130.217.24
dns04.mimecast.net. 300 A 170.10.128.103
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0