simple_module_mail

Outgoing mail for simple_module apps. The module owns the transport (SMTP via aiosmtplib, or a console backend that logs each message) and its settings, and installs a process-level sender that any module can use through simple_module_core.mail without knowing whether mail is configured.

The default backend is console: messages are logged, nothing is delivered. Switch to smtp and fill in the server details to deliver real email.

Install

Add the package to your host and re-sync. Discovery picks it up from the simple_module entry point, no host code changes:

# host/pyproject.toml
dependencies = ["simple_module_mail"]

uv sync --all-packages

Usage

1. Sign in as an admin and open Settings -> Modules -> Mail.
2. Set backend to smtp and fill smtp_host, smtp_port, smtp_username, smtp_password (masked in the UI), smtp_from and smtp_tls. Saving rebuilds the sender live, no restart needed.
3. Use Test connection to run the mail.mailer health check. It logs in to the server and hangs up without sending anything.

From code, send through the core interface:

from simple_module_core.mail import MailMessage, current_mail_sender

await current_mail_sender().send(
    MailMessage(to="a@example.com", subject="Hello", text="Plain body")
)

Code that may run in the outbox worker (no app) calls await resolve_mail_sender(db) instead; the module installs a resolver that builds the sender from the stored settings. sender.delivers_email is False for the console backend, so screens can fall back to showing a link.

Settings stored by earlier versions as users.mailer / users.smtp_* are moved to mail.backend / mail.smtp_* by a data migration.