Send transactional mail from your project.
The product in the sidebar is Email Zones. Create one from Email Zones → New. Give it a name and a region.
SMTP
The zone page shows SMTP credentials for the relay. Use them from your app or any mail client that can speak SMTP. The password is a secret; copy it when you need it.
Sending domains
Add a sending domain, prove it with the TXT record the dashboard shows, then add the DKIM (and SPF / DMARC) records so mail is signed and aligned. DKIM is required to activate. An activated domain is required for the From address. The zone lists recent messages and whether they were delivered.
Attach the zone to an app to inject the SMTP settings as environment variables on the next deploy.
Price
€0.00025 per delivered message. Bounces and rejects are not billed as delivered. See Pricing.