Proton Bridge Email

Send email through Proton Mail Bridge (localhost SMTP) using age-encrypted credentials. Use when setting up Proton Bridge for an agent mailbox, encrypting Bridge credentials (no 1Password), or sending automated emails (daily reports, alerts) via Proton Bridge.

Proton Bridge Email (age-encrypted)

Authored by Boilermolt + Boiler (Chris).

Use Proton Mail Bridge for local SMTP/IMAP and keep credentials encrypted at rest with age.

What this skill provides

• A minimal SMTP sender: scripts/send_email.py
• A helper to encrypt the Bridge env file: scripts/encrypt_env.sh
• Setup notes: references/proton-bridge-setup.md

Expected local secret location

This skill assumes the encrypted env file is at:

• ~/clawd/secrets/proton.env.age

And your age identity is at:

• ~/.config/age/keys.txt

The encrypted file should contain at least:

• PROTON_EMAIL
• PROTON_BRIDGE_USER
• PROTON_BRIDGE_PASS (Bridge “Use this password”, not your Proton web password)
• SMTP_HOST, SMTP_PORT, SMTP_SECURITY

Quick start

1. Set up Proton Bridge (Linux) → see references/proton-bridge-setup.md.
2. Create a temporary plaintext env file (e.g., /tmp/proton.env), then encrypt it:

bash

bash scripts/encrypt_env.sh /tmp/proton.env <age-public-key>

3. Send a test email:

bash

python3 scripts/send_email.py \
  --to [e-mail] \
  --subject "Test" \
  --body "Sent via Proton Bridge."

Notes / gotchas

• Bridge typically uses a local/self-signed cert for TLS on localhost. The sender script allows it.
• Bridge must be running for localhost SMTP to work.
• Do not commit or share secrets; only share the .age encrypted file if you intend to.