DioTransManual
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Email and SSO settings

You can configure your organization’s own mail server (SMTP) and an external OIDC provider (SSO). Both are optional; the standard features work without them.

1Email settings (SMTP)

Configure the SMTP server used for file transfer notifications and download verification codes. If it is not configured, the system mail sender is used.

The SMTP settings screen with current settings, a change form, and a connection test
Email settings. Check the current settings, then edit and run a connection test.
ItemDescription
SMTP host / portThe mail server host name and port. Port 25 cannot be used from Cloudflare Workers. Use 587 (STARTTLS) or similar.
SSL/TLS (SMTPS) / STARTTLSChoose the connection method that matches your port.
Username / passwordLeave blank if no authentication is required. Credentials are stored encrypted.
From email address / display nameThe sender of notification emails. Using your organization’s domain is recommended.

“Test connection” sends a test email so you can verify. Save after a successful test. “Delete settings” returns to the system mail sender.

2Authentication settings (OIDC / SSO)

Configure an external OIDC provider (Microsoft Entra ID, Google, or custom) to enable organization single sign-on (SSO).

The OIDC settings screen with provider, issuer URL, client ID, SSO status, and a configuration form
OIDC settings. The URLs you need for the IdP are shown on this screen.

  1. Register the app with the IdP

    In your provider’s app registration, set the “Redirect URL” and “Post-logout redirect URL” shown on the screen. Choose “Web” as the platform.

  2. Enter the provider details

    Enter the provider type (Microsoft Entra ID / Google / custom), tenant ID or issuer URL, client ID, client secret, and scopes (for example, openid email profile).

  3. Test the connection

    Use “Test connection”. Always test before enabling. The client secret is stored encrypted.

  4. Enable SSO and share the URL

    Choose “Enable SSO” and save. Share the “SSO log-in URL” (/auth/login?org=organization-slug) with your members.

Changing providers

Changing the provider re-links all members by email address at their next log-in. Users whose email address changed are created as new accounts. Tell users before making the change.

See Signing up and logging in for the SSO log-in steps.