Amazon web services – Sending AWS SNS notification to dynamic email address

Unfortunately, SNS does not allow dynamic creation of topic subscribers or dynamically setting the endpoint (email address) from the message body or attributes. When you subscribe an email endpoint to an SNS topic, the endpoint must be statically defined during the subscription process.

but what you can do, is creating different SNSs, with a specific users for each, and then you dynamically choose which SNS you want to forward the message to. but this requires a mapping between users (or email addresses) and SNS topics.

with SES it’s possible, so you can create a lambda as an SNS subscriber and it will take the message and do all the work. this is an example of how it may be done:

def lambda_handler(event, context):
    ses_client = boto3.client('ses')
    
    for record in event['Records']:
        sns_message = json.loads(record['Sns']['Message'])
        email_address = sns_message.get('email')  
        message_body = sns_message.get('body', 'Default body text')

        response = ses_client.send_email(
            Source='[email protected]',
            Destination={
                'ToAddresses': [email_address]
            },
            Message={
                'Subject': {
                    'Data': 'Dynamic Email Subject'
                },
                'Body': {
                    'Text': {
                        'Data': message_body
                    }
                }
            }
        )
    return {'statusCode': 200, 'body': 'Email sent successfully'}