A simple REST API service to verify email addresses. Using SMTP Callback Verification.

Make a request.

curl -i "http://localhost/verify/?email=paul@gmail.com"

Which generates the following response.

{
  "email": "paul@gmail.com",
  "isValid": true
}

1. Build project with Go. go build
2. Spin up server locally. PORT=8080 ./smtp-callback-verification Note that server port is read from the environment.
3. Send a request. curl -i "http://localhost:8080/verify/?email=paul@gmail.com"

1. Create a Heroku app with Go buildpack. heroku create -b https://github.com/kr/heroku-buildpack-go.git
2. Deploy this app to Heroku. git push heroku master
3. Send a request. curl -i "http://<YOUR_APP>.herokuap.com/verify/?email=paul@gmail.com"