Send Email Notifications via API

Email Notifications Without the Complexity

Email remains the most universal notification channel. Every user has an email address, and it is the expected medium for order confirmations, password resets, account alerts, and business communications. But setting up reliable email delivery is surprisingly difficult. You have to deal with SMTP configuration, authentication protocols like SPF, DKIM, and DMARC, deliverability reputation, bounce handling, and the differences between email service providers.

One-Ping abstracts all of that into a single API call. You configure your email provider once in the dashboard, and then every email notification uses the same /send endpoint you use for Telegram, Slack, and every other channel. No switching between different SDKs. No learning different payload formats. Just one API for everything.

Email Features Built for Developers

One-Ping gives you a clean, developer-friendly interface for email notifications without sacrificing the features you need for production use.

Code Examples

Sending an email notification through One-Ping is identical to sending through any other channel. The only difference is the channel name in your request. Here is how it looks in practice.

cURL

# Send an email notification
curl -X POST https://api.one-ping.com/send \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "to": "[email protected]",
    "subject": "Your order has shipped",
    "message": "Hi Alex, your order #1042 has been shipped. Track it here: https://track.example.com/1042",
    "channels": ["email"]
  }'

JavaScript

// Send an email notification with One-Ping
const response = await fetch('https://api.one-ping.com/send', {
  method: 'POST',
  headers: {
    'Authorization': 'Bearer YOUR_API_KEY',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    to: '[email protected]',
    subject: 'Your order has shipped',
    message: 'Hi Alex, your order #1042 has been shipped.',
    channels: ['email']
  })
});

const result = await response.json();
// { "success": true, "id": "msg_xyz789", "channels": { "email": "delivered" } }

Python

import requests

response = requests.post(
    'https://api.one-ping.com/send',
    headers={
        'Authorization': 'Bearer YOUR_API_KEY',
    },
    json={
        'to': '[email protected]',
        'subject': 'Your order has shipped',
        'message': 'Hi Alex, your order #1042 has been shipped.',
        'channels': ['email']
    }
)

print(response.json())

Need to notify users on multiple channels? Change the array to ["email", "telegram"] and both will be sent simultaneously. See our multi-channel guide for advanced patterns.

Setting Up Email in One-Ping

Configuring your email provider takes just a few minutes. One-Ping supports multiple provider types so you can use whatever service you already have.

Email Deliverability Tips

Sending an email is easy. Getting it to the inbox is the hard part. Here are best practices to make sure your notifications actually reach your users:

• Authenticate your domain: Set up SPF, DKIM, and DMARC records. This is the single most important step for deliverability. Without it, many inbox providers will flag your emails as suspicious.
• Use a consistent sender address: Stick to one "from" address like [email protected]. Changing sender addresses frequently hurts your reputation.
• Keep content relevant: Avoid spam-trigger words and make sure every email you send is something the recipient expects. Notification emails typically have excellent engagement rates because they contain information the user asked for.
• Monitor bounce rates: One-Ping tracks bounces in your dashboard. If you notice high bounce rates, clean your recipient list. Hard bounces damage your sender reputation.
• Do not send to purchased lists: This should go without saying for notification emails, but never send to addresses that did not opt in. One-Ping is designed for transactional and notification emails, not bulk marketing.

Common Use Cases for Email Notifications

Email is the backbone of most notification systems. Here are the scenarios where One-Ping's email channel shines:

• Order confirmations and shipping updates: Send a summary email the moment an order is placed, and follow up when it ships. Pair with Telegram for instant mobile alerts. See our e-commerce notification guide.
• Account activity alerts: Notify users about password changes, new logins from unrecognized devices, or billing updates.
• Scheduled reports: Send daily or weekly summary reports to stakeholders. Use n8n to automate the schedule without any backend code.
• Form submission receipts: When someone fills out a form on your site, send them a confirmation email and notify your team on Slack at the same time.
• Appointment reminders: Reduce no-shows by sending email reminders 24 hours before scheduled appointments. Combine with WhatsApp for higher open rates.

One-Ping vs. Direct Email APIs

Services like SendGrid, Resend, and Amazon SES are excellent at delivering email. But they only handle email. If your application needs to notify users through multiple channels, you end up integrating and maintaining several different APIs. Here is how One-Ping compares:

One-Ping does not replace your email provider. It sits on top of it, giving you a consistent interface that works the same way whether you are sending an email, a Telegram message, or a Discord notification. Switch from SendGrid to Resend without touching your application code. That is the power of a unified API.

Frequently Asked Questions

Can I use my existing SendGrid or Resend account?

Yes. One-Ping connects to your existing email provider. You are not locked into any specific service. Simply enter your API key or SMTP credentials in the dashboard, and One-Ping routes emails through your account.

Do you support HTML emails?

Yes. You can send both HTML and plain text emails. If you send HTML, One-Ping can automatically generate a plain text version as a fallback for email clients that do not render HTML.

Can I customize the "from" name and address?

Yes. Configure your default sender name and email address in the dashboard. You can also override these per-request if you need to send from different addresses for different notification types.

What about email templates?

One-Ping focuses on simplicity. For basic notifications, pass your message content directly. For complex HTML templates, render them on your side and pass the HTML string in the request body. This gives you full control over your email design.

How do I handle unsubscribes?

Since One-Ping is designed for transactional notifications (not marketing emails), unsubscribe management is typically handled at the application level. However, we recommend including an unsubscribe link in your emails to comply with email regulations.