Domains with DNS TXT v=spf1 include:spf.protection.outlook.com include:smtp-out-1.constellationhbs.com -all

There are 18 domains that have DNS TXT set to v=spf1 include:spf.protection.outlook.com include:smtp-out-1.constellationhbs.com -all. The top 18 records ordered by domain rank are listed below.

We're currently tracking 345,594,140 DNS TXT records. Use our API to retrieve detailed information for DNS domains and records. Data is updated daily.