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glama

Proton Mail MCP Server

Enables AI assistants to send, read, search, and organize email from Proton Mail accounts via SMTP and IMAP.

→ fincher65/proton-mail-mcp · listed on glama

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// key findings

⚠️

Known vulnerabilities in dependencies: 1 high

Affects packages this MCP installs at runtime. Upgrade or remove the affected dependency.

✅

32 tools verified — handlers match their declared behaviour

9 read-only tools verified — handlers contain no write/delete/exec

✅

No credential exfiltration, no sensitive file access, no obfuscation

Static analysis found nothing flowing your secrets to unexpected places.

✅

Open source with a license and README

Anyone can audit the code, the license is declared, and the publisher documents what it does.

🔐

You'll be asked for 2 credentials: IMAP_PASSWORD, PROTONMAIL_PASSWORD

These are read from process.env at runtime. Make sure you trust where they’ll be sent.

// known CVEs in dependencies1 high3 low

Disclosed vulnerabilities in this server's declared npm dependencies (via OSV). Whether each is reachable depends on the installed versions.

highnodemailer@8.0.5GHSA-p6gq-j5cr-w38f

Nodemailer: Message-level raw option bypasses disableFileAccess/disableUrlAccess, enabling arbitrary file read and full-response SSRF in the delivered message

lownodemailer@8.0.5GHSA-268h-hp4c-crq3

Nodemailer: CRLF injection in Nodemailer List-* header comments allows arbitrary message header injection

lownodemailer@8.0.5GHSA-r7g4-qg5f-qqm2

Nodemailer: Improper TLS Certificate Validation in OAuth2 Token Fetch Enables Credential Interception

lownodemailer@8.0.5GHSA-wqvq-jvpq-h66f

Nodemailer jsonTransport bypasses disableFileAccess and disableUrlAccess during message normalization

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// required environment variables

This server reads these from process.env. You'll be asked to provide them before it can run.

configALLOW_EMPTY_FOLDER— Folder & label management -- create_folder, create_label, rename_folder, delete_folder (non-destructive on Proton); empty_folder (opt-in via =true; not recommended)

configALLOW_FILE_DOWNLOAD_DIR— Attachments -- send files (base64), download to memory or to disk (saveTo + ), forward a subset by part number

configIMAP_HOST— 127.0.0.1 Proton Mail Bridge host

🔐 secretIMAP_PASSWORD— _falls back to SMTP password_ Bridge password

configIMAP_PORT— 1143 Bridge IMAP port

configIMAP_SECURE— false Use TLS

configIMAP_USERNAME— _falls back to SMTP username_ Bridge username

configPROTONMAIL_HOST— smtp.protonmail.ch SMTP host

🔐 secretPROTONMAIL_PASSWORD— "": "your-smtp-password"

configPROTONMAIL_PORT— 587 SMTP port

configPROTONMAIL_SECURE— false Use TLS (true for port 465)

configPROTONMAIL_USERNAME— "": "your-email@protonmail.com",

configREADONLY— false Disable all mutating tools (send/reply/forward, drafts, move/delete/flags/labels, bulk_, create/rename/delete folders + labels, empty_folder, thread mutations)

configRESTRICT_OUTBOUND_TO_SELF

// full audit trail

The full breakdown of what we checked, the deductions that landed, the network hosts, the dependency advisories, and concrete fix guidance is available to verified publishers.

// improvement guidance — verified publishers only

We have 4 concrete improvements we can share with the publisher of this MCP. Each comes with specific guidance to raise the trust score.

// embed badge in your README

[![M8ven Score](https://m8ven.ai/badge/mcp/fincher65-proton-mail-mcp-guv8nz)](https://m8ven.ai/mcp/fincher65-proton-mail-mcp-guv8nz)

commit: 8b4c5c3716a83d892e307d54aa3a88be8d57ffcb

code hash: 7eab93bb33e04cb306bbe4915269c2bd82d756ee1daeb3cfcdbe5eb30793d5b1

verified: 7/13/2026, 9:45:47 AM

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