I have set up a rule set for inbound emails in AWS SES.

• Deliver to S3 bucket
• Invoke AWS Lambda function
• Stop rule set

This rule set successfully forward all my domain emails to my personal gmail account.
However server start to respond to every email with: Delivery Status Notification (Failure)

This message could not be delivered due to a recipient error. Please try again later.
...
Diagnostic-Code: smtp; 451 4.3.0 This message could not be delivered due to a recipient error. Please try again later.
Status: 4.3.0

Even if I remove Lambda invocation and Deliver to S3 bucket, still have same error.

How to prevent SES from sending error response?

I seen an old question Amazon SES inbound email delivery failed 4.3.0 451

In my case it’s clearly different reason for error.