Email SaaS Cloud
Integrate in 10 minutes, not two sprints. Full OpenAPI spec, Postman collection, and webhook verification SDK included — because we actually want you to ship.
Generate typed clients for any language directly from the spec. Validate your integration contracts before shipping to production. The spec is always in sync with the running API — no version drift, no "that endpoint changed and nobody updated the docs" surprises.
Download OpenAPI specReady-to-run requests for email send, status checks, delivery timelines, SMS, and webhooks. Import, set your API key, and send your first message in under two minutes. No "read the docs first" tax.
Download Postman collectionVerify that webhook events actually came from us — not from someone replaying intercepted payloads. Replay-safe idempotency built in. Available as a published package. Install and start verifying in two lines.
Integration referenceIf your app already sends email through SMTP (SendGrid, Mailgun, Amazon SES), you can point it at our relay with zero code changes. Your current provider's lock-in strategy depends on you believing migration is hard. It isn't. Configure your SMTP credentials in the dashboard after signing in, then update your mail client or application to use the host below.
smtp.commtunnel.cloud587 — submission with STARTTLS2525 — alternate port (same relay)Full setup guide available in the Email and SMTP Operations page after signing in.
Receive real-time delivery events (delivered, bounced, deferred, complained) and engagement signals (opened, clicked) at your endpoint. Events are signed with HMAC-SHA256 so you can verify authenticity and reject forgeries. Built-in deduplication and retry logic handles network hiccups without duplicate processing on your end. No "we sent it, your server's problem" support tickets.
Send OTPs, alerts, and standard messages through a unified API. Provider adapters handle routing to Hollatags or other providers — if one goes down, the next picks up automatically. Sender IDs are managed per-organization with approval workflows. Delivery receipts and opt-out handling are built in, not bolted on.
Send and receive WhatsApp messages using Meta's Cloud API. Configure your webhook callback URL, verify with your app token, and start sending from the same API you use for email and SMS. Template management and delivery analytics are included — no separate vendor signup, no separate support queue.