Domains with DNS TXT v=spf1 mx ip4:66.111.107.173 include:penton.com include:_netblocks.mimecast.com include:mxlogic.net
There is 1 domain that have DNS TXT set to v=spf1 mx ip4:66.111.107.173 include:penton.com include:_netblocks.mimecast.com include:mxlogic.net.