SMTP Relay
Works with CRMs, commerce platforms and existing applications using standard SMTP.
- STARTTLS on ports 587 and 2525
- Per-credential traffic controls
- Standard SMTP response codes

Use SMTP for instant compatibility or integrate the Email API for deeper control. Both routes share the same delivery engine, suppression layer and event stream.
{
"from": "team@example.com",
"to": ["user@example.net"],
"subject": "Hello",
"metadata": {"order": "8412"}
}Gmail Ready
Microsoft Managed
Other providers Ready
VuelaMail keeps the integration surface small. Authenticate your domain, create a credential and send. Routing, provider throttling, bounce handling and retries run behind the same interface.
Works with CRMs, commerce platforms and existing applications using standard SMTP.
A focused JSON API for transactional and campaign sends with clear acceptance results.
Stream delivery, bounce, complaint and unsubscribe events back to your application.
Every accepted request enters a durable queue. Temporary provider responses are retried with backoff; permanent recipient failures are classified and suppressed.
Queued recipients and progress checkpoints survive service restarts and infrastructure maintenance.
state: queued → accepted → deliveredDomain-specific rate limits and retry schedules keep one provider from slowing the whole campaign.
route: provider-aware / adaptiveHard bounces, complaints and unsubscribes are removed before future sends reach the delivery queue.
suppression: global / immediateRecipient-level outcomes keep accepted, delivered, deferred and failed states separate.
events: signed / replay-safeChoose SMTP or API and keep the same delivery infrastructure as you scale.