Better Email MCP Server
@n24q02m/better-email-mcp
npm
v1.40.1
Source verified
Published by n24q02m — publish provenance cryptographically ties this package to that repository. That is proof of origin, not an official vendor package.
Better MCP server for Email (IMAP/SMTP) with composite tools optimized for AI agents
The grade answers one question — how safe is this server for you to adopt — so it is computed in two auditable stages. Nothing below is an opinion or an LLM's guess; every line is a real term the deterministic engine applied, and the same input always yields the same number.
1. Threat score — 100 − 0 = 100. What the published surface and source actually contain:
The deterministic scan raised no scored threat in the surface it inspected — the threat score stayed at 100. Capability observations and advisory notes are recorded but never lower it.
2. Client adoption risk — 100 − 6 = 94. Three small, subtract-only factors that reflect your risk in adopting it — a clean scan proves less on a powerful, unverified or barely-inspectable package, so the grade says so plainly:
| Points | Adoption-risk factor |
|---|---|
| −6 | capability blast radius (high) — client exposure if the model is manipulated |
Capability observations and info notes are shown under Findings but never scored.
Open any row's finding below for the file, line and evidence behind a deduction.
Findings 2
high Dynamic code execution in server code (bin/cli.mjs)MTC-SRC-001
In the server's implementation (`bin/cli.mjs:48`): Evaluating strings as code is the most direct RCE primitive; if any tool input reaches it, the server executes attacker-chosen code. This is read from the code itself — not from the tool description — so a poisoned server cannot hide it behind honest-looking metadata.
Evidence: e=ud.toString();return new Function(`return ${e}`)()(r)}var Hl=new WeakMap;Wl.quickSort=function(r,e,t=0){let n=Hl.get(
Fix: Review this call path: confirm it never receives unsanitized tool input, constrain it, or remove it. Treat a server whose code reaches these sinks as high-capability regardless of what its tools claim.
Location: server bin/cli.mjs
medium Untrusted input can drive an external actionMTC-FLOW-005
Untrusted-input tools ([attachments]) co-exist with external-action tools ([messages]). A prompt injection could cause unwanted external actions, though no direct sensitive-data leak path was found.
Evidence: untrusted [attachments] → sinks [messages]
Fix: Require confirmation for state-changing/egress actions triggered after processing untrusted content.
Location: flow attachments → messages
Tools 6
Each tool and what it can reach — statically extracted from the published source.
attachmentsingests untrusted inputmessagesnetwork egressconfigno sensitive capabilityconfig__open_relayno sensitive capabilityfoldersno sensitive capabilityhelpno sensitive capability
Toxic flows 1
Cross-tool combinations that form a data-exfiltration primitive (untrusted input → sensitive source → external sink).
What this scan could not see
- Tools were statically extracted from the published source (6 recovered), not enumerated from a running server. Tool-poisoning, Unicode-smuggling, capability and toxic-flow analysis ran on this inferred surface, but a mis-parsed registration could be missed or mis-attributed, so tool-derived findings are capped below “confirmed”. To grade the real runtime surface, scan the running server: --command "npx -y <package>".
Versions 7
Scan history per published version. The engine is deterministic — the same version always yields the same score, so a changed score means the package itself changed.
| Version | Score | Findings | Engine | Scanned |
|---|---|---|---|---|
v1.40.1 latest |
A 94/100 | 2 | 1.13.0 | 2026-09-07 |
v1.40.0 |
A 94/100 | 2 | 1.13.0 | 2026-08-31 |
v1.39.0 |
A 94/100 | 2 | 1.13.0 | 2026-08-29 |
v1.38.3 |
A 94/100 | 2 | 1.12.1 | 2026-08-15 |
v1.38.2 |
A 94/100 | 2 | 1.12.1 | 2026-08-12 |
Show 2 more versions ↓
v1.37.0 |
A 94/100 | 2 | 1.12.1 | 2026-08-10 |
v1.36.0 |
A 94/100 | 2 | 1.10.0 | 2026-07-25 |
Embed this score
Show this server's live Trust Score in your README, docs or website. The badge is served straight from the registry and updates automatically after every rescan — no API key needed. It links back to this page, so anyone who sees the grade can also read the findings behind it instead of taking a number on faith.
Verify this score yourself
The score above is reproducible: the same package version always yields the same result. Run it locally or over the free API — no account, no LLM, fully deterministic.
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