# Proton Mail (unofficial)

> Unofficial Proton Mail MCP — send, read, search & organize email over SMTP and IMAP

- name: io.github.sethbang/proton-mail-mcp
- version: 1.0.2
- connection class: L0 (run_local_package)
- trust: 86/100
- quality: –/100 (not scored)
- owner: not claimed
- descriptor: https://api.protogrid.dev/v1/servers/io.github.sethbang%2Fproton-mail-mcp
- tools: https://api.protogrid.dev/v1/servers/io.github.sethbang%2Fproton-mail-mcp/tools

**Runs on your machine: something must execute the package.** Only local packages are published (npm, PyPI, OCI, …). The registry never executes them, so tools are unknown until you run it.

## Connection (mcpServers)

```json
{
  "mcpServers": {
    "proton-mail-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "proton-mail-mcp@1.0.2"
      ],
      "env": {
        "PROTONMAIL_USERNAME": "${PROTONMAIL_USERNAME}",
        "PROTONMAIL_PASSWORD": "${PROTONMAIL_PASSWORD}",
        "PROTONMAIL_HOST": "smtp.protonmail.ch",
        "PROTONMAIL_PORT": "587",
        "PROTONMAIL_SECURE": "false",
        "IMAP_HOST": "127.0.0.1",
        "IMAP_PORT": "1143",
        "IMAP_SECURE": "false",
        "IMAP_PASSWORD": "${IMAP_PASSWORD}",
        "READONLY": "false",
        "RESTRICT_OUTBOUND_TO_SELF": "false",
        "ALLOW_EMPTY_FOLDER": "false",
        "DEBUG": "false"
      }
    }
  }
}
```

Placeholders to fill: `${PROTONMAIL_PASSWORD}`, `${IMAP_PASSWORD}`.

## Trust

- hygiene: 100
- liveness: n/a
- freshness: 65
- provenance: 90
- drivers: +repository +namespace-matches-repo +website ~liveness-unmeasured ~updated-143d-ago
- Derived from observable signals (official registry feed and our own credential-free probes); no code audit performed.

## Quality –/100 (not scored)

Not scored: fewer than three checks apply, usually because no remote answered a credential-free probe or the server is a local package.

### protocol: n/a (weight 25)

- n/a `protocol.modern`, `protocol.stateless`, `protocol.transport`, `protocol.list_ttl`: no remote answered a protocol handshake (not probed yet, unreachable, or local-only)

### authorization: n/a (weight 15)

- n/a `auth.prm`, `auth.as_metadata`, `auth.cimd`: no remote uses OAuth
- n/a `auth.secret_in_url`: no templated URL

### tool hygiene: n/a (weight 30)

- n/a `tools.descriptions`, `tools.description_length`, `tools.schemas`, `tools.annotations`, `tools.directory_hints`, `tools.token_cost`, `tools.api_dump`: tool list unknown (behind auth, not probed, or empty)

### stability: n/a (weight 15)

- n/a `stability.changes`, `stability.rug_pull`: tool list unknown

### dependencies: 33 (weight 15)

- fail `deps.known_vulns`: 4 advisories to act on (malicious, or rated high or critical with a fix available): GHSA-2x7j-588g-ccc2 in nodemailer@8.0.11 (direct, fixed in 9.1.0), GHSA-p6gq-j5cr-w38f in nodemailer@8.0.11 (direct, fixed in 9.0.1), GHSA-v53p-9fqp-m79j in nodemailer@8.0.11 (direct, fixed in 10.0.6), ...; 5 more of lower severity or without a fix
- fail `deps.mcp_sdk_version`: @modelcontextprotocol/sdk 1.30.1 has 1 known advisory (GHSA-6qxp-vccf-f47h); update @modelcontextprotocol/sdk to 1.31.0 or later
- pass `deps.resolvable`: proton-mail-mcp@1.0.2 resolved: 154 packages

- tools: unknown
- badge: [![protogrid quality](https://protogrid.dev/badge/io.github.sethbang/proton-mail-mcp.svg)](https://protogrid.dev/servers/io.github.sethbang/proton-mail-mcp)
- Checks run on what our credential-free, read-only probes observe; tools are never called and no code audit is performed.

### Tool changes

_No tool definition changes recorded._

## Dependencies

- npm proton-mail-mcp@1.0.2: resolved, 153 dependencies, MCP SDK @modelcontextprotocol/sdk 1.30.1
  - GHSA-6qxp-vccf-f47h (high) in `` @modelcontextprotocol/sdk@1.30.1 ``, direct, fixed in `` 1.31.0 ``, advisory summary: "MCP TypeScript SDK: OAuth client could send credentials to an authorization server chosen by the MCP server" https://osv.dev/vulnerability/GHSA-6qxp-vccf-f47h
  - GHSA-2x7j-588g-ccc2 (high) in `` nodemailer@8.0.11 ``, direct, fixed in `` 9.1.0 ``, advisory summary: "Nodemailer: Quadratic (O(n²)) time complexity in addressparser allows remote denial of service via a crafted address list" https://osv.dev/vulnerability/GHSA-2x7j-588g-ccc2
  - GHSA-p6gq-j5cr-w38f (high) in `` nodemailer@8.0.11 ``, direct, fixed in `` 9.0.1 ``, advisory summary: "Nodemailer: Message-level raw option bypasses disableFileAccess/disableUrlAccess, enabling arbitrary file read and full-response SSRF in the delivered message" https://osv.dev/vulnerability/GHSA-p6gq-j5cr-w38f
  - GHSA-v53p-9fqp-m79j (high) in `` nodemailer@8.0.11 ``, direct, fixed in `` 10.0.6 ``, advisory summary: "Nodemailer: Quadratic backtracking in the addressparser free-text fallback allows remote denial of service" https://osv.dev/vulnerability/GHSA-v53p-9fqp-m79j
  - GHSA-68fv-2mgg-jv7q (high) in `` source-map-js@1.2.1 ``, indirect, fixed in `` 1.2.2 ``, advisory summary: "source-map-js allows event-loop denial of service through indexed source-map section offsets" https://osv.dev/vulnerability/GHSA-68fv-2mgg-jv7q
  - GHSA-6vj9-mwq6-2f5v (moderate) in `` nodemailer@8.0.11 ``, direct, fixed in `` 10.0.2 ``, advisory summary: "Nodemailer: Process-global DNS cache reuses TLS \`servername\` across transports, enabling cross-tenant SMTP credential disclosure" https://osv.dev/vulnerability/GHSA-6vj9-mwq6-2f5v
  - GHSA-8m3c-c648-2xjj (moderate) in `` nodemailer@8.0.11 ``, direct, fixed in `` 9.1.1 ``, advisory summary: "Nodemailer: resolveContent() on a MailMessage bypasses disableFileAccess/disableUrlAccess when called with the legacy signature" https://osv.dev/vulnerability/GHSA-8m3c-c648-2xjj
  - GHSA-8vvx-rff5-p5rq (moderate) in `` nodemailer@8.0.11 ``, direct, fixed in `` 10.0.2 ``, advisory summary: "Nodemailer: Nested structured recipient arrays bypass the parser depth limit and cause stack exhaustion DoS" https://osv.dev/vulnerability/GHSA-8vvx-rff5-p5rq
  - GHSA-cc9r-2j5m-2m83 (moderate) in `` nodemailer@8.0.11 ``, direct, fixed in `` 9.1.0 ``, advisory summary: "Nodemailer: Recipient-domain validation bypass via RFC 5322 comment mis-parsing leads to email delivery to an attacker-controlled domain" https://osv.dev/vulnerability/GHSA-cc9r-2j5m-2m83
  - GHSA-wmmp-3585-3rmp (moderate) in `` nodemailer@8.0.11 ``, direct, fixed in `` 9.1.0 ``, advisory summary: "Nodemailer: IDN/Punycode domain allow-list bypass leads to email delivery to an attacker-controlled domain" https://osv.dev/vulnerability/GHSA-wmmp-3585-3rmp

Dependency graphs from deps.dev; advisories from OSV.dev, including the GitHub Advisory Database and the PyPI Advisory Database; all CC BY 4.0.

## Remotes

_none_

## Packages

- npm proton-mail-mcp@1.0.2 secrets: PROTONMAIL_PASSWORD, IMAP_PASSWORD

## Tools (0)

_none observed_