fix fields not exported in json

backup.go

@@ -36,7 +36,7 @@ func main() {
 	}
 
 	if *testMailFlag {
-		SendMail(cfg.Email.smtpHost, cfg.Email.fromEmail, "test backup email topic", "test backup email body", cfg.Email.toEmail)
+		SendMail(cfg.Email.SmtpHost, cfg.Email.FromEmail, "test backup email topic", "test backup email body", cfg.Email.ToEmail)
 		os.Exit(0)
 	}
 
@@ -47,7 +47,7 @@ func main() {
 	}
 
 	if len(email.items) > 0 {
-		SendMail(cfg.Email.smtpHost, cfg.Email.fromEmail, "Autobackup report", fmt.Sprintf("%v", email.items), cfg.Email.toEmail)
+		SendMail(cfg.Email.SmtpHost, cfg.Email.FromEmail, "Autobackup report", fmt.Sprintf("%v", email.items), cfg.Email.ToEmail)
 		log.Printf("Sending summary email\r\n%v", email.items)
 	}
 }

config.go

@@ -54,21 +54,21 @@ func (c *Config) Load() error {
 		return err
 	}
 
-	if len(cfg.Email.smtpHost) == 0 {
+	if len(cfg.Email.SmtpHost) == 0 {
 		if *debugFlag {
 			log.Printf("Config.Load : no smtp")
 		}
 		return fmt.Errorf("no smtp")
 	}
 
-	if len(cfg.Email.fromEmail) == 0 {
+	if len(cfg.Email.FromEmail) == 0 {
 		if *debugFlag {
 			log.Printf("Config.Load : no email from")
 		}
 		return fmt.Errorf("no email from")
 	}
 
-	if len(cfg.Email.toEmail) == 0 {
+	if len(cfg.Email.ToEmail) == 0 {
 		if *debugFlag {
 			log.Printf("Config.Load : no email to")
 		}

email.go

@@ -14,9 +14,9 @@ type Email struct {
 }
 
 type EmailConfig struct {
-	smtpHost  string   `json:"smtp"`
-	fromEmail string   `json:"email_from"`
-	toEmail   []string `json:"email_to"`
+	SmtpHost  string   `json:"smtp"`
+	FromEmail string   `json:"email_from"`
+	ToEmail   []string `json:"email_to"`
 }
 
 func SendMail(addr, from, subject, body string, to []string) error {