Domains with DNS TXT v=spf1 ip4:5.181.216.51 include:relay.mailchannels.net include:spf.protection.outlook.com -all
There are 2 domains that have DNS TXT set to v=spf1 ip4:5.181.216.51 include:relay.mailchannels.net include:spf.protection.outlook.com -all. The top 2 records ordered by domain rank are listed below.