diff --git a/cmd/sytest/config-example.json b/cmd/sytest/config-example.json
new file mode 100644
index 000000000..6d31feb7b
--- /dev/null
+++ b/cmd/sytest/config-example.json
@@ -0,0 +1,8 @@
+{
+    "src": "path of dendrite's source code on your computer, ends with '/'",
+    "send_mail": false,
+    "username": "your email account",
+    "password": "your email password",
+    "host": "your email smtp host",
+    "port": "your email port"
+}
\ No newline at end of file
diff --git a/cmd/sytest/sytest.go b/cmd/sytest/sytest.go
new file mode 100644
index 000000000..20f635f86
--- /dev/null
+++ b/cmd/sytest/sytest.go
@@ -0,0 +1,114 @@
+package main
+
+import (
+	"crypto/tls"
+	"encoding/json"
+	"fmt"
+	"io/ioutil"
+	"net"
+	"net/smtp"
+	"os"
+	"os/exec"
+
+	"github.com/sirupsen/logrus"
+)
+
+func main() {
+	err := exec.Command("git", "pull").Run()
+	if err != nil {
+		logrus.WithError(err).Fatal("Run git pull failed")
+	}
+	logrus.Info("Git update done")
+	err = os.RemoveAll("./cmd/sytest/result")
+	if err != nil && !os.IsNotExist(err) {
+		logrus.WithError(err).Fatal("Remove old result failed")
+	}
+	file, err := ioutil.ReadFile("./cmd/sytest/config.json")
+	if err != nil {
+		logrus.WithError(err).Fatal("Read config file failed")
+	}
+	var cfg struct {
+		Src      string `json:"src"`
+		SendMail bool   `json:"send_mail"`
+		Username string `json:"username"`
+		Password string `json:"password"`
+		Host     string `json:"host"`
+		Port     string `json:"port"`
+	}
+	err = json.Unmarshal(file, &cfg)
+	if err != nil {
+		logrus.WithError(err).Fatal("Unmarshal config file failed")
+	}
+	res, err := exec.Command("docker", "run", "--rm",
+		"-v", cfg.Src+":/src/",
+		"-v", cfg.Src+"cmd/sytest/result:/logs/",
+		"matrixdotorg/sytest-dendrite").Output()
+	if err != nil {
+		logrus.WithField("output", string(res)).WithError(err).Fatal("Run sytest docker image failed")
+	}
+	logrus.Info("Sytest done")
+	out, err := exec.Command("./are-we-synapse-yet.py",
+		"-v", "./cmd/sytest/result/results.tap").Output()
+	if err != nil {
+		logrus.WithError(err).Fatal("Run are-we-synapse-yet failed")
+	}
+	if cfg.SendMail {
+		auth := smtp.PlainAuth("",
+			cfg.Username,
+			cfg.Password,
+			cfg.Host)
+		to := []string{"all@workly.ai"}
+		content := []byte(fmt.Sprintf("From:%s\r\nTo:all@workly.ai\r\nSubject:Are We Synapse Yet?\r\nContent-Type:text/plain;charset=utf-8\r\n\r\n%s", cfg.Username, out))
+		err = sendMail(cfg.Host+":"+cfg.Port, auth, cfg.Username, to, content)
+		if err != nil {
+			logrus.WithError(err).Fatal("Send mail failed")
+		}
+	} else {
+		logrus.Info("\n" + string(out))
+	}
+}
+
+func sendMail(addr string, auth smtp.Auth, from string, to []string, msg []byte) (err error) {
+	c, err := dial(addr)
+	if err != nil {
+		return err
+	}
+	if auth != nil {
+		if ok, _ := c.Extension("AUTH"); ok {
+			if err = c.Auth(auth); err != nil {
+				return err
+			}
+		}
+	}
+	if err = c.Mail(from); err != nil {
+		return err
+	}
+	for _, addr := range to {
+		if err = c.Rcpt(addr); err != nil {
+			fmt.Print(err)
+			return err
+		}
+	}
+	w, err := c.Data()
+	if err != nil {
+		return err
+	}
+	_, err = w.Write(msg)
+	if err != nil {
+		return err
+	}
+	err = w.Close()
+	if err != nil {
+		return err
+	}
+	return c.Quit()
+}
+
+func dial(addr string) (*smtp.Client, error) {
+	conn, err := tls.Dial("tcp", addr, nil)
+	if err != nil {
+		return nil, err
+	}
+	host, _, _ := net.SplitHostPort(addr)
+	return smtp.NewClient(conn, host)
+}