sourceArn

This parameter is used only for sending authorization. It is the ARN of the identity that is associated with the sending authorization policy that permits you to send for the email address specified in the Source parameter.

For example, if the owner of example.com (which has ARN arn:aws:ses:us-east-1:123456789012:identity/example.com) attaches a policy to it that authorizes you to send from user@example.com, then you would specify the SourceArn to be arn:aws:ses:us-east-1:123456789012:identity/example.com, and the Source to be user@example.com.

Instead of using this parameter, you can use the X-header X-SES-SOURCE-ARN in the raw message of the email. If you use both the SourceArn parameter and the corresponding X-header, Amazon SES uses the value of the SourceArn parameter.

For information about when to use this parameter, see the description of SendRawEmail in this guide, or see the Amazon SES Developer Guide.