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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 require a flexible email solution.
When using Amazon SES, you might encounter the error message: SignatureDoesNotMatch. This error indicates that the request signature does not match the expected signature, which is crucial for authenticating requests to AWS services.
The SignatureDoesNotMatch error occurs when the signature included in your request does not match the signature AWS calculates. This discrepancy can arise from incorrect AWS credentials, a mismatch in the signing process, or errors in the request parameters.
To resolve the SignatureDoesNotMatch error, follow these steps:
Ensure that you are using the correct AWS Access Key ID and Secret Access Key. You can manage your credentials in the AWS IAM Console. Make sure the credentials are active and have the necessary permissions.
Review your request to ensure it is correctly formatted. Pay attention to the headers and parameters. Use tools like AWS CLI to test and debug your requests.
Ensure your system clock is synchronized with a reliable time source. AWS uses time-based signatures, so any significant time drift can cause signature mismatches. Use ntpdate
or similar tools to sync your system time.
Double-check the signature calculation process in your code. Refer to the AWS Signature Version 4 Signing Process documentation for guidance on correctly signing your requests.
By following these steps, you should be able to resolve the SignatureDoesNotMatch error in Amazon SES. Ensuring correct credentials, request formatting, and time synchronization are key to successful AWS request authentication.
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