Open Settings > Email. Pick a provider:
- SMTP: classic SMTP host with username and password.
- Microsoft Graph: send through your tenant's Microsoft 365 mailbox.
- Cloudflare Worker: route through a Cloudflare Worker, useful when you cannot allow direct SMTP.
- Custom: any HTTP relay.
Whatever you pick, send a test mail before saving.
Provider notes
SMTP requires host, port, encryption mode (STARTTLS or SSL), and credentials. Most providers also need a verified "from" address.
Microsoft Graph uses your tenant's existing Entra app registration. The shared mailbox or service account you nominate must have permission to send mail.
Cloudflare Worker posts to a Worker endpoint you operate. This is the recommended path when corporate policy forbids outbound SMTP from the application tier.
Custom posts JSON to any HTTP endpoint. You provide the URL and any auth header. Use this when you front your own delivery service.
Test before saving
Always click Send test after entering credentials. The portal will not let you save a configuration that has never produced a successful test send in the current session.