SES Email Forwarder

Introduction

This is the definition of an AWS lambda function for forwarding emails sent to an SES email address and forwarded to an S3 Bucket. The lambda function is designed to be triggered on any PUT call to the specific S3 bucket. The actual lambda function is defined in lambda_forward_email.py.

Testing

In the example folder there are two scripts`

• test-email-sending.bash: A bash that exports the config file local_config.sh to the shell and then calls test_email_sending.py
• test_email_sending.py: A python script that calls the process_message function from ses_email_forwarding.lambda_forward_email on a test S3 Object key.

The example script can be invoked using:

$ ./example/test-email-sending.bash $S3_OBJECT_KEY

In order for this to work a python3 virtual environment should first be created using

$ python3 -m venv .venv
$ source .venv/bin/activate
$ pip install -r requirements.txt

the following things must be configured:

#This is needed for boto3 to be able to connect to S3
$ awscliv2 configure
#Alternatively, you can directly create $HOME/.aws/credentials

SES email forwarding must be set up to send emails to an S3 bucket, and SES must also be enabled to send emails programatically.

Once awscliv2 and SES email storage and sending are configured, the next step is to create the local_config.sh file. Simply run

$ cp config.sh local_config.sh

and then write the relevant values into the environment variables in local_config.sh. Note: from_addr must be an email address or domain registered with amazon SES.

As final note, in order for the example script to work, S3_OBJECT_KEY must be an object that exists in the SES email bucket.

Deployment

When to deploying to a lambda function, all the values defined in config.sh must be defined as environment variables in the lambda function, and the lambda function must be set up to trigger on PUT requests to the S3 bucket, and the IAM role must have a policy added that gives it List and Get access permissions for the relevant bucket. The contents of ses_email_forwarding/lambda_forward_email.py can then be copied into lambda_function.py and the function can be tested and deployed.

Development

COMING SOON

Maintainers

Taylor Jacovich tjacovich@astrophysicist-adjacent.com