Handling MailGun Events with a Lambda Function

What is this?

A simple lambda function to process email events received from MailGun via a webhook (eg, email-delivered, email-opened, user-clicks, unsubscribes, etc...). It stores the raw event in a DynamoDB Table and publishes a transformed version to an SNS Topic

How to use

• Run the build command to generate a new dist folder (or simply use the exising dist folder)
• Change the AWS Region in dist/src/publisher.js and dist/src/storage.js to your preferred region
• Change the TopicArn in the dist/src/publisher.js file to your SNS TopicArn
• Change the dynamodbTableName to your DynamoDB Table name
• Update the value of signingKey in dist/src/main.js to your mailgun signing key - consider using env vars here (I didn't use it on purpose)
• From within the dist folder, zip up the content zip -r dist.zip . and upload the zip file to your AWS lambda environment

Running the dev version

• download and configure aws-cli with your credentials

• npm install the app

• create your sns topic and dynamoDB table as specified in the How to use section - You'll also change these values in serverless.yml file

• serverless invoke local -f processMailgunEvent (to run a local invokation of the lambda)

• Deploy with serverless deploy -s prod