SequenzySMTP Relay

Send email from anywhere via SMTP

Already have apps that send email via SMTP? Point them at Sequenzy. Get better deliverability and unified analytics without changing your code.

SOC 2 Compliant
99.9% Uptime
Sub-second Delivery

Why Sequenzy for SMTP Relay?

Built for developers who want reliability without complexity.

Works With Everything

Any application that supports SMTP can use Sequenzy. WordPress, custom apps, legacy systems, you name it.

No Code Changes

Just update your SMTP credentials. Your existing sending code stays exactly the same.

Unified Analytics

Emails sent via SMTP show up in your Sequenzy dashboard. Same open tracking, same click tracking, same reports.

Improved Deliverability

Send through our infrastructure with proper authentication. Better inbox placement than most shared SMTP servers.

Developer Experience

Ship emails in minutes, not days

Sequenzy's API is designed for developers who value simplicity. A few lines of code and you're sending transactional emails with enterprise-grade deliverability.

View full docs →
Send with the Sequenzy SDK
npm install sequenzy
import Sequenzy from 'sequenzy';

// Initialize the Sequenzy client
const client = new Sequenzy({ apiKey: 'your-api-key' });

// Send using a template (recommended)
const response = await client.transactional.send({
  to: 'user@example.com',
  slug: 'password-reset',
  variables: {
    RESET_LINK: 'https://app.example.com/reset?token=abc123',
    USER_NAME: 'John',
    EXPIRES_IN: '24 hours'
  }
});

// Or send with custom content (no template needed)
await client.transactional.send({
  to: 'user@example.com',
  subject: 'Password Reset Request',
  body: '<h1>Reset your password</h1><p>Click the link below...</p>',
  variables: {
    USER_NAME: 'John'
  }
});

console.log('Email queued:', response.jobId);

Type-safe SDKs

Full TypeScript support with autocomplete

Automatic retries

Built-in exponential backoff

Webhook events

Real-time delivery notifications

How it works

Get started with Sequenzy in just a few steps.

1

Get your SMTP credentials

Generate SMTP credentials in your Sequenzy dashboard. You'll get a host, port, username, and password.

2

Update your application

Replace your current SMTP settings with Sequenzy credentials. Most apps have a settings page for this.

3

Send email as usual

Your application sends email exactly like before. We handle delivery, authentication, and tracking.

4

Track everything in one place

View SMTP-sent emails alongside your campaigns in the Sequenzy dashboard. Same analytics, same subscriber profiles.

Built for real-world use cases

See how SaaS teams use Sequenzy smtp relay.

WordPress and CMS Platforms

Most CMS platforms use SMTP for email. Point them at Sequenzy and get reliable delivery for contact forms, notifications, and user emails.

Example

WordPress contact form submissions delivered reliably instead of going to spam.

Legacy Applications

Got an old app that only supports SMTP? No problem. Sequenzy speaks SMTP fluently. Upgrade your deliverability without touching code.

Example

10-year-old invoice system now has modern email delivery.

Development and Testing

Use Sequenzy SMTP in your development environment to test email flows with real delivery. See exactly what recipients will get.

Example

Staging environment sends through Sequenzy to verify email templates work correctly.

Multi-System Architecture

Different systems need to send email? Consolidate everything through Sequenzy. One set of credentials, one analytics dashboard, one deliverability reputation.

Example

CRM, support desk, and billing system all send through the same Sequenzy account.

Why use Sequenzy for SMTP

Better than generic SMTP providers

Feature
Sequenzy
Others
Marketing email unified
Subscriber profiles
Open and click tracking
Varies
Deliverability monitoring
Limited
Webhook notifications
Varies
No per-email pricing
Simple, transparent pricing

Start free, scale as you grow

One price for everything. No per-email fees, no hidden costs.

MonthlyYearly
Free Plan
$0/month
Up to 100 subscribers in sequences
2k emails/month
100100k+
100 subscribers in sequences2k emails/month

Free includes:

  • Up to 100 subscribers in sequences
  • 2,000 emails/month
  • Email campaigns
  • Email sequences
  • Advanced analytics
  • Advanced segments
  • Stripe integration(Segment by LTV & MRR)
  • API access
  • "Built by Sequenzy" branding

Start for free

Frequently Asked Questions

Everything you need to know about Sequenzy SMTP Relay.

Host: smtp.sequenzy.com Port: 587 (TLS) or 465 (SSL) Authentication: Required Username and password are generated in your dashboard.

Emails sent via SMTP are included in your plan. They count toward your monthly sending limits just like campaigns and transactional API calls.

Yes. We automatically add tracking to HTML emails sent via SMTP. Open tracking uses a pixel, click tracking wraps your links. You can disable tracking if needed.

Yes. If you send to an email address that's already a subscriber, the email appears in their profile. For new addresses, we create a subscriber record automatically.

We support PLAIN and LOGIN authentication over TLS. OAuth is not currently supported for SMTP, but our REST API supports API key authentication if you prefer.

Yes. Configure your domain in Sequenzy, set up SPF and DKIM records, and emails sent via SMTP will use your domain. This is important for deliverability.

We allow reasonable sending rates. For bulk sending, we recommend using our REST API or campaign features which are optimized for high volume. SMTP is best for application-triggered transactional emails.

Yes. You can send attachments up to 10MB total per email via SMTP. For larger files, we recommend hosting them and including download links.

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