internal/

Package api owns the HTTP layer: the chi router, the JSON wire types, and the handlers.

Package cloud is the Mailtrap Sandbox Send API client.

Package config loads optional user configuration from YAML at `$XDG_CONFIG_HOME/mailtrap-local/config.yml` (override path with MAILTRAP_LOCAL_CONFIG).

Package htmlcheck implements the email-client compatibility report served at GET /api/v1/message/{id}/html_check.

Package jobs runs the side effects that fire on every newly captured message: cloud mirror, relay mirror, webhook delivery.

Package live is the in-process pub-sub for SPA live updates.

Package relay forwards messages through an upstream SMTP server.

Package secrets owns at-rest encryption for sensitive values stored in the local SQLite DB — the Mailtrap cloud API token, the SMTP relay password, the webhook signing secret.

Package smtpd is the in-process SMTP listener.

Package store owns the SQLite database — schema, models, queries.

Package webhook delivers HMAC-signed POSTs to a configured receiver URL on every newly captured message.