This source code is to send transaction email with AWS lambda and set up SAM for local development

• Install serverless in local https://serverless.com/framework/docs/getting-started/
• Set up aws credentials https://serverless.com/framework/docs/providers/aws/guide/credentials/

• Install Python . https://www.python.org/downloads/
• Install Docker. https://docs.docker.com/install/
• Install SAM in local . https://docs.aws.amazon.com/lambda/latest/dg/sam-cli-requirements.html

• After you install all of the above requirement, install require package npm install.
• Enter the source code folder. And then find the folder name config. In that folder there is the dev.yml file (you can also create your environment as file name but you need to deploy your serverless package with your environment). In that file, change recipient email, access_key_id, access_key_secret and region to your desire email.

You can test this lambda function locally. In order to do that, follow this step.

• Enter your source code folder and type sls sam export -o template.yml in console , than all of you changes in dev.yml file will sync to SAM defination file.
• Type sam local start-api and then you can test your lambda function in your local with http://localhost:3000/mail?username=TEST-INLOCAL&email=testinlocal0909@gmail.com

Then transaction email will send your email inbox.

I was create DKIM record for my domain and set up in SES console. If you want to test with your own domain, change sender value to your dkim identified email.

I was manually created metric logs for email open, click, send events. So, metrics can check manually on cloud watch dashboard.