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Send Transactional Emails Without the Setup Overhead

Use clean SDKs, preverified domains and built-in deliverability tools to send transactional emails reliably without the setup overhead of DNS configuration or complex integration.

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Built for modern SaaS teams - the same kind you'll find at ...

Activision
Airtable
Algolia
Docker
EON
Mercury
Perplexity
Typeform
Vercel
Webflow
Activision
Airtable
Algolia
Docker
EON
Mercury
Perplexity
Typeform
Vercel
Webflow

Install
In Seconds

Run the install—no DNS required.

npm i mailblock
Provisioned in 300ms

Send Your
First Email

Initialize with your API key, paste the three line snippet, and send. Preverified domains and defaults handle deliverability.

See all examples
import Mailblock from 'mailblock';

const client = new Mailblock('your-api-key-here');

export async function sendEmail() {
  const result = await client.send({
    to: 'user@example.com',
    subject: 'Welcome!',
    template: 'welcome',
    data: { name: 'John' }
  });
  
  return result;
}

Send Today,
Not Next Week

Skip the setup overhead of DNS configuration, domain verification, and weeks of manual work without compromising deliverability. Start sending transactional emails in minutes with pre-warmed domains and built-in tools.

Send today — no DNS setup.

Send today — no DNS setup.

  • Warmed, pre configured trusted domains from day one.
  • SPF, DKIM, DMARC pre-configured
  • Switch to your own domain anytime.
  • Skip the setup overhead of DNS configuration and domain verification.
Clean SDKs in Every Major Language

Clean SDKs in Every Major Language

  • JS, Python, Go, Ruby, PHP, Java, .NET — plus REST/SMTP.
  • One consistent flow: install → init → send.
  • First send in under 2 minutes.
  • Start sending transactional emails in minutes.
Deliverability & Debug Built-In

Deliverability & Debug Built-In

  • Events & webhooks for delivered, bounced, opened, clicked.
  • One-switch Debug mode with request logs.
  • Scheduling and retries out of the box.
  • Built-in deliverability tools handle everything automatically.

Simple Integration Flow

From installation to your first email in under 2 minutes. No complex setup, no DNS configuration required.

Flow diagram

Connect. Measure. Protect.

One SDK to reach every inbox with clear outreach insights. Security that's audit-ready and enterprise-grade from day one.

Connect once, reach them all.

Your app talks to one API while Mailblock handles provider differences, routing, and deliverability automatically. Switch between providers seamlessly without changing your code.

Measure What Matters

Track outreach performance: sends, deliveries, opens, replies, and bounce rates, compared against historical baselines automatically. Get real-time insights to optimize your email campaigns and improve engagement rates.

Lock

Security & Compliance

Encryption, access controls, and audit logging keep your emails safe, compliant, and recoverable during incidents.

Signed requests, domain controls, and SLAs ensure authenticity, privacy, and reliability from sandbox to production. Enterprise-grade security architecture meets regulatory requirements without compromising performance.

“Pre-warmed domains changed everything for us. Our emails actually land in the inbox now, not spam. Zero configuration, maximum deliverability from day one.”

— Anonymous Founder

Simple, Transparent Pricing

Choose the plan that fits your email sending needs

Free

Perfect for getting started.

0€

for ever

500 emails daily
6,000 emails monthly
Basic Ticket support
max 3 email accounts
no-email warmup
Get Started
Most Popular

Pro

For growing businesses.

20€

per month

5,000 emails daily
60,000 emails monthly
Priority Ticket support
unlimited email accounts
2 accounts can be warmed up per month
Get Started

Enterprise

For large scale operations.

100€

per month

20,000 emails daily
300,000 emails monthly
24h Ticket support
unlimited email accounts
5 accounts can be warmed up per month
Get Started