4n6ir.com
Google & Yahoo Email Changes
by John Lukach
Google and Yahoo require SPF, DKIM, and DMARC configurations through DNS to help address the high number of fraudulent emails by February 1, 2024. I built an API that checks if a domain has an active MX with SPF and DMARC configured. The DNS lookups actively occur from AWS, so I would not use this when investigating malicious domains.
https://mx.tundralabs.net/4n6ir.com
{
"domain": "4n6ir.com",
"mx": "YES",
"spf": "YES",
"dmarc": "YES"
}