Question and response
Question
dig us._netblocks.mimecast.com. TXT
Answer
us._netblocks.mimecast.com. 300 TXT "v=spf1 ip4:207.211.31.0/25 ip4:205.139.110.0/24 ip4:216.205.24.0/24 " "ip4:170.10.129.0/24 ip4:63.128.21.0/24 ip4:170.10.133.0/24 ip4:185.58.84.93/32 ip4:207.211.41.113/32 ip4:207.211.30.64/26 ip4:207.211.30.128/25 ip4:216.145.221.0/24 ip4:170.10.128.0/24 ip4:170.10.132.56/29 ip4:170.10.132.64/29 ~all"
Authority
mimecast.com. 86400 NS dns01.mimecast.net.
mimecast.com. 86400 NS dns02.mimecast.net.
mimecast.com. 86400 NS dns04.mimecast.net.
mimecast.com. 86400 NS dns03.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