SMTP
Configure an authenticated SMTP account with SMTP_HOST, SMTP_PORT, SMTP_SECURE,
SMTP_USERNAME, SMTP_PASSWORD, SMTP_FROM_ADDRESS, and SMTP_FROM_NAME. Port 465 normally uses
implicit TLS; port 587 normally uses STARTTLS.
The development Compose stack uses Mailpit and the E2E suite discovers verification and reset links
through its API without human interaction. Optional real-mail testing reads only the ignored
.env.smtp-e2e.local file and runs with bun run registry:test:smtp-e2e; it is never required for
ordinary CI.