Imports
- github.com/aws/aws-sdk-go/aws
- github.com/aws/aws-sdk-go/aws/credentials
- github.com/aws/aws-sdk-go/aws/session
- github.com/aws/aws-sdk-go/service/sesv2
- github.com/cybozu-go/log
- github.com/emersion/go-sasl
- github.com/emersion/go-smtp
- github.com/sendgrid/sendgrid-go
- github.com/sendgrid/sendgrid-go/helpers/mail