Your team's email, under your control.
Multi-domain email infrastructure. IMAP, DKIM, SPF, DMARC configured automatically. Integrated webmail, forwarding, webhooks, and API access. Production-ready.
99.99%
Uptime SLA
< 50ms
SMTP latency
8
SDK languages
RBAC
4 access levels
// Send your first email in 60 seconds const res = await fetch('https://api.inkbox.io/api/v1/emails/send', { method: 'POST', headers: { 'Authorization': 'Bearer ink_live_••••••••••••', 'Content-Type': 'application/json', }, body: JSON.stringify({ from: 'noreply@yourdomain.com', to: 'user@example.com', subject: 'Welcome aboard!', html: '<p>Hello <b>World</b> 👋</p>', }), }); // { "status": "queued", "messageId": "<abc@yourdomain.com>" }
Up and running in 3 steps
Add your domain
Register your domain and Inkbox guides you through DNS — MX, SPF, DKIM, DMARC — verified automatically.
Create an API token
Generate a scoped API token from your dashboard. Grant only the permissions your integration needs.
Send your first email
One HTTP call. Your email is queued, delivered, and tracked. Events fire to your webhook in real-time.
Email hosting
Professional email infrastructure
Multi-Domain
Manage your domains with automated DNS — MX, SPF, DKIM, DMARC configured in a single click from your workspace, with built-in trash, archiving, and forwarding.
DNS · DKIM · SPF · ForwardIntegrated Webmail
A professional built-in webmail client, accessible from any browser with IMAP, SMTP, encryption, trash/archiving, and scheduled sending — automatically disabled when a domain is deleted.
IMAP · SMTP · TLS · WebmailMulti-Tenant
Complete isolation between client workspaces. Each tenant manages their own domains, mailboxes, and billing.
Tenant · Isolation · SaaSDeveloper API
Transactional email for developers
Transactional Emails
Send triggered emails via a single REST call — welcome flows, password resets, order receipts. HTML + plain text, attachments, CC/BCC.
REST · HTML · AttachmentsWebhooks & Events
Subscribe to delivery events (sent, bounced, complained, opened, clicked) and receive signed payloads in real-time to your endpoint.
Events · HMAC · RetryMarketing Campaigns
Manage audience lists, import subscribers from CSV, and send bulk campaigns with suppression list enforcement.
Audiences · CSV · SuppressionREST API Endpoints
Webhook payload example
{
"event": "email.delivered",
"timestamp": "2026-04-25T10:01:00Z",
"signature": "sha256=abc123...",
"data": {
"messageId": "<abc@yourdomain.com>",
"recipient": "user@example.com",
"latency": 142
}
}Security you can trust
Built from the ground up with zero-trust principles. Every layer is protected.
Transparent, scalable pricing
From testing to production at scale. No hidden fees.
Ready to take control of your email infrastructure?
Join the teams that trust Inkbox to manage their professional email infrastructure.