Receiving emails with Bref PHP and SendGrid

Bref is a composer package that facilitates running serverless PHP applications on AWS Lambda by providing necessary layers for PHP support, which Lambda doesn't natively offer. The tutorial guides users through building and deploying a serverless PHP application to process incoming emails using SendGrid Inbound Parse, including setting up a local development environment with Composer, npm, and the serverless CLI tools. It details creating a project with Bref, configuring SendGrid to handle incoming emails, and using Slack API for notifications. The tutorial also covers setting up AWS credentials and deploying the application to Lambda, with instructions on managing IAM roles and permissions. The application processes JSON payloads from emails, extracts sender and recipient information, and sends notifications to Slack, showcasing the integration of serverless functions with cloud services. Users are encouraged to explore further resources like Bref and serverless framework documentation for advanced features and security enhancements through Lambda Authorizers.