postbox-tools
Free email checks: 24 blacklists, spoofing/BEC grade, redirect tracing, email spam test, WHOIS.
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Calidad y seguridad
Basado en el análisis automatizado de las definiciones de herramientas y el cumplimiento del protocolo.
Costo de contexto
Este es el número aproximado de tokens que se consumen cada vez que las herramientas del servidor se cargan en el contexto de un modelo. Los recuentos más altos reducen la atención disponible para otras tareas.
Instalar
Instalación con un clic
Agrega esto a tu archivo `claude_desktop_config.json`:
{
"mcpServers": {
"postbox-tools": {
"url": "https://mcp.postboxservices.com/mcp"
}
}
}Puntos de conexión remotos
https://mcp.postboxservices.com/mcpstreamable-httpQué puede hacer
Inventario de herramientas
Herramientas (8)
🟢check_blacklist(target)
Check a domain (its mail-relevant IPs) or a single IP address against 24 DNS blacklists including Spamhaus ZEN, Barracuda and SpamCop. Returns per-IP listing status. Free tool by Postbox Services.
Esquema de entrada
{
"type": "object",
"properties": {
"target": {
"type": "string",
"description": "Domain (example.com) or IPv4 address to check"
}
},
"required": [
"target"
],
"additionalProperties": false,
"$schema": "http://json-schema.org/draft-07/schema#"
}🟢check_spoofability(domain)
Grade how exposed a domain is to email spoofing and business email compromise, from its public DNS (SPF, DMARC policy strength, alignment, live lookalike domains). Returns an A-F grade with findings. Free tool by Postbox Services.
Esquema de entrada
{
"type": "object",
"properties": {
"domain": {
"type": "string",
"description": "Domain to grade, e.g. example.com"
}
},
"required": [
"domain"
],
"additionalProperties": false,
"$schema": "http://json-schema.org/draft-07/schema#"
}⚪trace_redirect(url)
Follow a URL server-side through every HTTP redirect hop to its real final destination - per-hop status, IP, TLS and timing, plus phishing/deliverability flags (cross-domain jumps, https downgrades, meta/JS redirects). Free tool by Postbox Services.
Esquema de entrada
{
"type": "object",
"properties": {
"url": {
"type": "string",
"description": "Absolute http:// or https:// URL to trace"
}
},
"required": [
"url"
],
"additionalProperties": false,
"$schema": "http://json-schema.org/draft-07/schema#"
}🟡create_mailtest
Create a disposable test address for a full email deliverability audit (score /10: SPF, DKIM, DMARC + alignment, blacklists, reverse DNS, SpamAssassin content, Gmail/Yahoo bulk-sender compliance). The USER must then send an email from the system they want to test to the returned address, after which get_mailtest_result returns the score. Free tool by Postbox Services.
Esquema de entrada
{
"type": "object",
"properties": {},
"$schema": "http://json-schema.org/draft-07/schema#"
}🟡get_mailtest_result(id)
Fetch the score and breakdown of a mail test created with create_mailtest, once the user has sent their email to the disposable address.
Esquema de entrada
{
"type": "object",
"properties": {
"id": {
"type": "string",
"description": "The test id returned by create_mailtest"
}
},
"required": [
"id"
],
"additionalProperties": false,
"$schema": "http://json-schema.org/draft-07/schema#"
}🟡analyze_eml(eml)
Run a deliverability/content analysis on a raw RFC 822 email (.eml source: full headers + body). IMPORTANT LIMITS: with no live SMTP session, SPF, blacklist and reverse-DNS cannot be verified from a file - for the authoritative score use create_mailtest instead. Free tool by Postbox Services.
Esquema de entrada
{
"type": "object",
"properties": {
"eml": {
"type": "string",
"description": "The complete raw email source (headers + body), as exported via \"Show original\" / \"Download message\""
}
},
"required": [
"eml"
],
"additionalProperties": false,
"$schema": "http://json-schema.org/draft-07/schema#"
}🟢get_domain_age(domain)
Get a domain's registration date and age (young domains have weak sending reputation). Free tool by Postbox Services.
Esquema de entrada
{
"type": "object",
"properties": {
"domain": {
"type": "string",
"description": "Domain, e.g. example.com"
}
},
"required": [
"domain"
],
"additionalProperties": false,
"$schema": "http://json-schema.org/draft-07/schema#"
}⚪whois_lookup(domain)
WHOIS summary for a domain: registrar, created/updated/expires dates, nameservers, DNSSEC, status flags. Free tool by Postbox Services.
Esquema de entrada
{
"type": "object",
"properties": {
"domain": {
"type": "string",
"description": "Domain, e.g. example.com"
}
},
"required": [
"domain"
],
"additionalProperties": false,
"$schema": "http://json-schema.org/draft-07/schema#"
}Comunidad
Evidencia