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IP y red

Verificación de SPF

Análisis del registro SPF del dominio: mecanismos, includes, política.

Datos clave

Check a domain's SPF record online: enter the domain and see the v=spf1 record, a breakdown of mechanisms (include, ip4, mx and others), the all policy and warnings. Free, no sign-up. The 10-DNS-lookup limit is counted only on the top-level record, and nested includes are not expanded.

Precio
Gratis
Registro
No necesario
Procesamiento
On our server: we query the domain's TXT records in DNS and parse the first v=spf1 record; nested includes are not expanded
Entrada
A domain (for example example.com) or a site address
Límites
30 checks per minute per IP; no sign-up; only mechanisms of the top-level record are counted, nested includes and redirect are not expanded
Resultado
The SPF record text, a table of mechanisms (qualifier, type, value), the all policy, the number of mechanisms causing DNS lookups, warnings (over 10 lookups, +all, ?all) and a 0–100 score
Última actualización

Código abierto en GitHub

Ejecuta la misma comprobación en tu propio equipo: una herramienta de línea de comandos de Node.js, una biblioteca y una GitHub Action. Código abierto con licencia MIT.

ksanyok/spf-checker

Verificación del registro SPF

Comprueba el registro SPF (Sender Policy Framework) de un dominio. Un SPF correcto evita la suplantación de direcciones de correo desde tu dominio.

Análisis del registro SPF
Verificación de mecanismos (include, ip4, a, mx)
Conteo de consultas DNS (límite de 10)

Cómo usar

  1. Introduce un nombre de dominio para analizar el registro SPF
  2. La herramienta extraerá el registro SPF del DNS y analizará todos los mecanismos
  3. Revisa la lista de servidores autorizados y la cantidad de consultas DNS

FAQ

Enter the domain and click Check SPF. The tool requests the TXT records, finds the v=spf1 record and shows the mechanisms, the all policy, the number of DNS lookups and warnings. No sign-up; the limit is 30 checks per minute.

The domain's TXT records contain no string beginning with v=spf1. Either SPF is not set up, or the record sits on another (sub)domain. For a domain you send mail from, add SPF.

-all (fail) asks the receiver to reject mail from unlisted sources, ~all (softfail) to mark it as suspicious, ?all (neutral) requires nothing, and +all allows everyone. Use -all or ~all to protect against spoofing.

Under RFC 7208, SPF evaluation may perform no more than 10 lookups for include, a, mx, ptr, exists and the redirect modifier. Exceeding it gives a permerror and mail may be rejected. Our tool counts only mechanisms of the top-level record; nested includes are not expanded.

SPF is only one of the checks. Deliverability also depends on DKIM, DMARC, domain and IP reputation and the message content. Check DKIM and DMARC on the neighbouring pages and make sure the domain in the email matches the one you tested.

No. Two v=spf1 records on one domain cause a permerror. Merge them into one with several includes. Our tool shows only the first record it finds and does not warn about a duplicate.

PromoPilot frente a alternativas: comparación

Comparamos solo lo que está confirmado en las páginas de cada servicio. Donde no pudimos confirmar un dato, la celda muestra "—".

Parámetro PromoPilot MXToolbox SPF Record Check dmarcian SPF Surveyor EasyDMARC SPF Record Checker
Gratis y límites Yes: 30 checks per minute, no sign-up — Listed under “Free DMARC Tools”; the page notes maintenance A free tool; limits not stated
Record syntax check Partly: mechanisms and the all policy ✓ diagnostic tests for errors ✓ errors and syntax problems with suggested fixes ✓ syntax, IP addresses, TXT records
Expansion of nested includes ✗ — An expandable tree of DNS queries per mechanism ✓ SPF lookup trees; checks for the “10 DNS lookup” error
Listing of third-party senders ✗ — ✓ third-party senders and IPs ✓ sending sources
DKIM and DMARC next to it ✓ separate pages with links — — —

Desplaza la tabla hacia los lados

Dónde somos más débiles: we do not expand nested includes and redirect, so the DNS lookup counter is understated, we do not detect a duplicate SPF record, and there is no list of third-party senders or history.

Cuándo elegir PromoPilot: When you want a quick look at a domain's SPF record, its policy and obvious problems (+all, ?all, many includes). If the record chains includes of large services and you need an exact lookup count under RFC 7208, use an analyzer that expands nested records.

Comprobado el: . "—" significa que no está confirmado en la página oficial; las condiciones y los precios cambian, así que consulta los sitios de cada servicio.

Promoción con enlaces en cascada para tu sitio Bono de $30Backlinks 5→50→5000 en más de 100 plataformas. Desde $30 para empezar, más un bono de $30 para nuevos usuarios.