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Correo Electrónico y Entregabilidad

Explore herramientas de estado de correo, listas negras, SPF, DKIM y DMARC.

About Correo Electrónico y Entregabilidad Utilities

Eliminate email deliverability failures and prevent domain spoofing. Generate RFC 7208 SPF records, build RFC 7489 DMARC policies, create RSA DKIM key pairs, and analyze raw email headers to resolve spam folder filtering.

Frequently Asked Questions

Why is DMARC authentication mandatory in 2026?

Mailbox providers like Google Workspace and Yahoo require valid DMARC, SPF, and DKIM alignment to prevent phishing and reject unauthenticated transactional emails.

How many DNS lookups can an SPF record cause?

RFC 7208 limits SPF records to 10 DNS lookups maximum. Exceeding 10 lookups causes a PermError and fails email validation.