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Amazon SES InvalidTemplateData error encountered when sending an email using Amazon SES.

The template data provided is invalid or incorrectly formatted.

Understanding Amazon SES

Amazon Simple Email Service (SES) is a cloud-based email sending service designed to help digital marketers and application developers send marketing, notification, and transactional emails. It is a reliable, cost-effective service for businesses of all sizes that need to send emails in bulk or individually.

Identifying the InvalidTemplateData Symptom

When using Amazon SES, you might encounter an error message stating InvalidTemplateData. This error typically occurs when there is an issue with the template data provided for an email. The symptom is usually observed when attempting to send an email using a template, and the operation fails with this specific error code.

Common Observations

  • Email sending fails with an error message.
  • The error code InvalidTemplateData is returned.
  • Emails are not delivered as expected.

Explaining the InvalidTemplateData Issue

The InvalidTemplateData error indicates that the template data provided does not match the expected format or contains invalid values. This can happen if the JSON structure of the template data is incorrect or if there are missing or extra fields that do not align with the template's placeholders.

Root Causes

  • Incorrect JSON format in the template data.
  • Mismatch between template placeholders and provided data.
  • Missing required fields in the template data.

Steps to Fix the InvalidTemplateData Issue

To resolve the InvalidTemplateData error, follow these steps:

Step 1: Verify Template Data Format

Ensure that the template data is in the correct JSON format. Use a JSON validator tool, such as JSONLint, to check for syntax errors.

Step 2: Match Template Placeholders

Check that the placeholders in your email template match the keys in your template data. For example, if your template has a placeholder {{name}}, ensure that your template data includes a key "name": "value".

Step 3: Include All Required Fields

Review the template to ensure all required fields are included in the template data. Missing fields can cause the InvalidTemplateData error.

Step 4: Test with Sample Data

Before sending emails in production, test your template with sample data to ensure everything works as expected. Use the Amazon SES SendEmail API for testing.

Conclusion

By following these steps, you can resolve the InvalidTemplateData error in Amazon SES. Ensuring your template data is correctly formatted and matches the template's placeholders is crucial for successful email delivery. For more information, refer to the Amazon SES Developer Guide.

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