Look up TXT records for any domain. TXT records hold SPF policies, DKIM keys, DMARC policies, domain verification tokens, and more.

Having more than one SPF TXT record on a domain causes both to fail. Learn how to detect duplicate SPF records and merge them correctly.

SPF flattening resolves include mechanisms to IP addresses, reducing DNS lookups. Learn how it works, the risks of manual flattening, and when you need automated flattening.

MTA-STS forces sending servers to use TLS when delivering email to your domain, closing the gap left by opportunistic STARTTLS. This guide covers the DNS TXT record, the HTTPS-hosted policy file, testing vs enforce mode, and common deployment mistakes.

Should your SPF record end with ~all (softfail) or -all (hardfail)? Understand the difference, when to use each, and the impact on email delivery.

No DKIM record found for your domain and selector. Learn how to find your DKIM selector, publish the DNS record, and verify the configuration.