Imports github.com/aws/aws-sdk-go/aws/session github.com/aws/aws-sdk-go/aws/credentials github.com/sendgrid/sendgrid-go gopkg.in/mailgun/mailgun-go.v1 github.com/sendgrid/sendgrid-go/helpers/mail github.com/aws/aws-sdk-go/aws github.com/aws/aws-sdk-go/service/ses Standard library imports crypto/tls fmt time net/smtp