Default

By default, transactional email is sent via Resend from noreply@diagnosly.app. The DKIM, SPF, and DMARC records for diagnosly are managed by us, you don't need to do anything.

Bring your own SMTP

Some customers want all email to flow through their corporate SMTP (e.g. for compliance / audit). Configure at Settings → SMTP:

Host
Port
Username
Password
From address (must match an authorised sender on your SMTP server)
TLS / STARTTLS

Once configured, all transactional email from your tenant goes through your SMTP server instead of Resend.

Testing

The SMTP settings page has a Send test email button, drops a "this is a test" email to your admin contact. If that fails, the page surfaces the SMTP error so you can troubleshoot (auth failed, connection refused, certificate invalid, etc.).