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Amazon SES MessageRejected error when sending emails via Amazon SES.

Email address is on the suppression list or email content violates policies.

Understanding Amazon SES

Amazon Simple Email Service (SES) is a cloud-based email sending service designed to help businesses send marketing, notification, and transactional emails. It is a cost-effective, flexible, and scalable solution for sending emails from within any application.

Identifying the MessageRejected Error

When using Amazon SES, you might encounter the MessageRejected error. This error typically occurs when an email fails to send due to specific issues related to the recipient's email address or the content of the email.

What You Observe

When this error occurs, you will see a message indicating that the email has been rejected. This can happen during the email sending process, and it prevents the email from being delivered to the intended recipient.

Exploring the MessageRejected Issue

The MessageRejected error can be attributed to two primary causes:

  • The recipient's email address is on the suppression list.
  • The email content violates Amazon SES policies.

Suppression List

Amazon SES maintains a suppression list to prevent sending emails to addresses that have previously resulted in a hard bounce or complaint. This helps maintain your sender reputation and ensures compliance with email sending best practices.

Email Content Policies

Amazon SES enforces strict content policies to prevent the sending of spam or malicious content. Emails that do not comply with these policies are rejected to protect recipients and maintain the integrity of the service.

Steps to Resolve the MessageRejected Error

To resolve the MessageRejected error, follow these steps:

1. Check the Suppression List

First, verify if the recipient's email address is on the suppression list. You can do this by using the Amazon SES Console or the AWS CLI.

aws ses list-suppressed-destinations --region your-region

If the address is on the list, you can request its removal if you believe it was added in error.

2. Review Email Content

Ensure that your email content complies with Amazon SES policies. Avoid using spam-like language, and ensure all links and attachments are safe. Refer to the Amazon SES Sending Email Best Practices for guidance.

3. Modify and Resend

After addressing the issues, modify your email content or recipient list as necessary and attempt to resend the email. Monitor the process to ensure successful delivery.

Conclusion

By understanding the causes of the MessageRejected error and following the steps outlined above, you can effectively troubleshoot and resolve this issue, ensuring smooth email delivery with Amazon SES.

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