Question and response
Question
dig za._netblocks.mimecast.com. TXT
Answer
za._netblocks.mimecast.com. 300 TXT "v=spf1 ip4:41.74.192.0/22 ip4:41.74.200.0/23 ip4:41.74.196.0/22 ip4:41.74.204.0/23 ip4:41.74.206.0/24 ~all"
Authority
mimecast.com. 86400 NS dns03.mimecast.net.
mimecast.com. 86400 NS dns04.mimecast.net.
mimecast.com. 86400 NS dns01.mimecast.net.
mimecast.com. 86400 NS dns02.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