Domains with DNS TXT v=spf1 ip4:174.142.221.51 include:relay.spamshield.io +a +mx +include:spf.protection.outlook.com -all

There are 5 domains that have DNS TXT set to v=spf1 ip4:174.142.221.51 include:relay.spamshield.io +a +mx +include:spf.protection.outlook.com -all. The top 5 records ordered by domain rank are listed below.

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