18.65.125.102
server-18-65-125-102.kix50.r.cloudfront.net
18.65.125.126
server-18-65-125-126.kix50.r.cloudfront.net
18.65.125.44
server-18-65-125-44.kix50.r.cloudfront.net
18.65.125.5
server-18-65-125-5.kix50.r.cloudfront.net

2600:9000:24bc:2000:1:6991:aa00:93a1
2600:9000:24bc:2200:1:6991:aa00:93a1
2600:9000:24bc:2400:1:6991:aa00:93a1
2600:9000:24bc:3200:1:6991:aa00:93a1
2600:9000:24bc:6200:1:6991:aa00:93a1
2600:9000:24bc:6c00:1:6991:aa00:93a1
2600:9000:24bc:a000:1:6991:aa00:93a1
2600:9000:24bc:e000:1:6991:aa00:93a1

us-smtp-inbound-1.mimecast.com.
us-smtp-inbound-2.mimecast.com.