Connect Elastic SMTP With API

Integrating an Elastic Email API server with Send Onyx can significantly enhance your email marketing efforts. While SMTP (Simple Mail Transfer Protocol) is a standard method for sending emails, using an API (Application Programming Interface) offers several advantages, including improved deliverability, faster sending speeds, and enhanced data tracking.

Why Choose API over SMTP

  1. Higher Efficiency: API connections are generally faster and more reliable than SMTP, ensuring quicker email deliveries.
  2. Enhanced Deliverability: APIs can provide better deliverability rates by efficiently managing email bounces and feedback loops.
  3. Scalability: APIs are more scalable, handling larger volumes of emails without compromising speed or performance.
  4. Detailed Analytics: Get real-time insights and detailed analytics about email performance, which is often not possible with SMTP.
  5. Improved Security: API keys add an extra layer of security compared to SMTP, reducing the risk of unauthorized access.

Steps to Add Elastic Email API Server to Acelle Mail

Step 1: Sign Up for Elastic Email

  • Create an Account: If you haven’t already, sign up for an account on Elastic Email.
  • Verify Your Domain: Follow Elastic Email’s process to verify your domain, which is critical for email deliverability.

Step 2: Obtain Your Elastic Email API Key

  1. Log into Elastic Email: Access your dashboard.
  2. Navigate to ‘Settings’: Find the Manage API section.
  3. Generate an API Key: Create a new API key. Ensure you enable all necessary permissions for the key to function correctly with Acelle Mail.

Step 3: Setting Up the API in Acelle Mail

  1. Log into Your Account: Access your Send Onyx dashboard.
  2. Access Sending Servers: Navigate to the ‘Sending Servers’ section.
  3. Add a New Server: Select the option to add a new server and choose Elastic Email API.
  4. Input API Details: Enter the Elastic Email API key.
  5. Save and Verify: Save your settings.

Step 4: Test the Integration

  • Send a Test Email: Once set up, send a test email to ensure the integration is working correctly.
  • Check Deliverability: Monitor the initial emails sent through the API for deliverability and performance.

Step 5: Monitoring and Adjustments

  • Regularly Check Performance: Keep an eye on the email performance metrics available in Elastic Email.
  • Adjust as Needed: Based on the analytics and performance data, make necessary adjustments to optimize your email campaigns.


Integrating Elastic Email’s API with Send Onyx enhances the efficiency, scalability, and effectiveness of your email marketing campaigns. By following these steps, you can set up a more robust and secure email delivery system, leveraging the advanced capabilities of API over traditional SMTP methods.

Important note: Make sure to add and verify your sending domain with Elastic inside the Settings > Manage domains section.

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