sender

type Email struct {
	logger.L
	SMTPClient
	EmailParams
}

type EmailParams struct {
	Host        string // SMTP host
	Port        int    // SMTP port
	From        string // From email field
	Subject     string // Email subject
	ContentType string // Content type, optional. Will trigger MIME and Content-Type headers

	TLS          bool   // TLS auth
	SMTPUserName string // user name
	SMTPPassword string // password
	TimeOut      time.Duration
}

type SMTPClient interface {
	Mail(string) error
	Auth(smtp.Auth) error
	Rcpt(string) error
	Data() (io.WriteCloser, error)
	Quit() error
	Close() error
}