Email Echo Tester

The Email Echo Tester is a serverless tool designed to help organisations validate their email authentication setups, including SPF, DKIM and DMARC; as well as demonstrate our BIMI configurations. Built on AWS infrastructure, the service ensures scalability, reliability, and cost efficiency while maintaining a secure and user-friendly experience.

Features

• Email Authentication Testing
  Analyse emails sent to the tester address for compliance with SPF, DKIM and DMARC standards.

• Automated Response for Passing Emails
  Replies are sent only if the email passes all validation checks. The reply includes:

  • A report of the validation results.
  • The headers of the email sent for testing.

• Serverless and Scalable
  Utilises AWS services for high performance and low cost:

  • Amazon Simple Email Service (SES): Handles inbound and outbound email with robust email processing capabilities.
  • AWS Lambda: Processes emails and runs validation logic efficiently without the need for dedicated servers.
  • Amazon S3: Stores detailed test results for future testing and retrieval.

How It Works

1. Send a Test Email
   Send an email from your domain to:
   [email protected]

2. Validation and Analysis
   The tool analyses the email for:

   • SPF alignment
   • DKIM signature validation
   • DMARC policy adherence

3. Receive a Reply
   If the email passes all checks:

   • A reply is sent containing the email's headers and a detailed validation report.
   • If checks fail, the email is logged for review, but no reply is sent.

Why Serverless?

The tool is built entirely using Platform-as-a-Service (PaaS) tools from AWS to ensure scalability, efficiency, and cost optimisation:

• Elastic Scaling: Automatically adjusts to handle high volumes of emails without manual intervention.
• Reduced Costs: Pay only for what you use—ideal for spiky or irregular usage patterns.
• Secure Processing: Emails are processed securely within AWS, leveraging SES’s anti-spam and threat detection capabilities.