postbox-tools
Free email checks: 24 blacklists, spoofing/BEC grade, redirect tracing, email spam test, WHOIS.
我该使用它吗
质量与安全性
发现（2）
- HIGHTool poisoning patterns detected
- MEDIUMTool description contains URL to non-standard domain在 trace_redirect 中
基于对工具定义和协议合规性的自动分析。
上下文开销
这是每次将服务器的工具加载到模型上下文窗口时所消耗的大致 token 数。数值越高，可用于其他任务的注意力就越少。
安装
一键安装
将以下内容添加到你的 `claude_desktop_config.json` 文件中：
{
"mcpServers": {
"postbox-tools": {
"url": "https://mcp.postboxservices.com/mcp"
}
}
}远程端点
https://mcp.postboxservices.com/mcpstreamable-http它能做什么
工具清单
工具（8）
🟢check_blacklist(target)
Check a domain against domain blacklists (Spamhaus DBL, SURBL, URIBL and others), or an IP address against 24 IP blacklists including Spamhaus ZEN, Barracuda and SpamCop. Checks the exact target given: domains are not resolved to IPs. Returns per-list listing status.
输入模式
{
"type": "object",
"properties": {
"target": {
"type": "string",
"description": "IPv4 address (checked against IP blacklists) or domain (checked against domain blacklists)"
}
},
"required": [
"target"
],
"additionalProperties": false,
"$schema": "http://json-schema.org/draft-07/schema#"
}🟢check_spoofability(domain)
Grade how exposed a domain is to email spoofing and business email compromise, from its public DNS (SPF, DMARC policy strength, alignment, live lookalike domains). Returns an A-F grade with findings.
输入模式
{
"type": "object",
"properties": {
"domain": {
"type": "string",
"description": "Domain to grade, e.g. example.com"
}
},
"required": [
"domain"
],
"additionalProperties": false,
"$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). Fetching is SSRF-hardened (private ranges blocked, HTTPS-only, per-hop validation); how it works: https://redirect.postboxservices.com/
输入模式
{
"type": "object",
"properties": {
"url": {
"type": "string",
"description": "Absolute http:// or https:// URL to trace"
}
},
"required": [
"url"
],
"additionalProperties": false,
"$schema": "http://json-schema.org/draft-07/schema#"
}🟡create_mailtest
Create a disposable test address for a full email deliverability audit (score /10: SPF, DKIM, DMARC + alignment, blacklists, reverse DNS, SpamAssassin content, Gmail/Yahoo bulk-sender compliance). The USER must then send an email from the system they want to test to the returned address, after which get_mailtest_result returns the score.
输入模式
{
"type": "object",
"properties": {},
"$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.
输入模式
{
"type": "object",
"properties": {
"id": {
"type": "string",
"description": "The test id returned by create_mailtest"
}
},
"required": [
"id"
],
"additionalProperties": false,
"$schema": "http://json-schema.org/draft-07/schema#"
}🟢analyze_eml(eml)
Run a deliverability/content analysis on a raw RFC 822 email (.eml source: full headers + body). IMPORTANT LIMITS: with no live SMTP session, SPF, blacklist and reverse-DNS cannot be verified from a file - for the authoritative score use create_mailtest instead.
输入模式
{
"type": "object",
"properties": {
"eml": {
"type": "string",
"description": "The complete raw email source (headers + body), as exported via \"Show original\" / \"Download message\""
}
},
"required": [
"eml"
],
"additionalProperties": false,
"$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).
输入模式
{
"type": "object",
"properties": {
"domain": {
"type": "string",
"description": "Domain, e.g. example.com"
}
},
"required": [
"domain"
],
"additionalProperties": false,
"$schema": "http://json-schema.org/draft-07/schema#"
}🟢whois_lookup(domain)
WHOIS summary for a domain: registrar, created/updated/expires dates, nameservers, DNSSEC, status flags.
输入模式
{
"type": "object",
"properties": {
"domain": {
"type": "string",
"description": "Domain, e.g. example.com"
}
},
"required": [
"domain"
],
"additionalProperties": false,
"$schema": "http://json-schema.org/draft-07/schema#"
}社区
证据