spf2.0/pra include:aspmx.sailthru.com -all
v=spf1 include:aspmx.sailthru.com -all
v=spf1 ip4:135.196.24.192/28 ip4:213.235.63.64/26 ip4:94.185.240.0/24 ip4:212.2.3.128/26 ip4:94.185.244.0/24 ip4:195.130.217.0/24 ip4:91.220.42.0/24 ~all
v=spf1 mx include:_netblocks.mimecast.com ~all