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)
 	}
 }