diff --git a/object/email.go b/object/email.go
index f0099dee..3a4d94b1 100644
--- a/object/email.go
+++ b/object/email.go
@@ -16,35 +16,20 @@
 
 package object
 
-import (
-	"strconv"
+import "github.com/go-gomail/gomail"
 
-	"github.com/astaxie/beego"
-	"github.com/go-gomail/gomail"
-)
+func SendEmail(title, content, dest, sender string) (string, error) {
+	provider := getDefaultEmailProvider()
+	if provider == nil {
+		return "Please set an Email provider first", nil
+	}
+	dialer := gomail.NewDialer(provider.Host, provider.Port, provider.ClientId, provider.ClientSecret)
 
-var dialer *gomail.Dialer
-
-var mailConn = map[string]string{
-	"user": beego.AppConfig.String("mailUser"),
-	"pass": beego.AppConfig.String("mailPass"),
-	"host": beego.AppConfig.String("mailHost"),
-	"port": beego.AppConfig.String("mailPort"),
-}
-
-func InitDialer() {
-	port, _ := strconv.Atoi(mailConn["port"])
-	dialer = gomail.NewDialer(mailConn["host"], port, mailConn["user"], mailConn["pass"])
-}
-
-func SendEmail(title, content, dest, sender string) error {
 	message := gomail.NewMessage()
-	message.SetAddressHeader("From", beego.AppConfig.String("mailUser"), sender)
+	message.SetAddressHeader("From", provider.ClientId, sender)
 	message.SetHeader("To", dest)
 	message.SetHeader("Subject", title)
 	message.SetBody("text/html", content)
-	if dialer == nil {
-		InitDialer()
-	}
-	return dialer.DialAndSend(message)
+
+	return "", dialer.DialAndSend(message)
 }
diff --git a/object/provider.go b/object/provider.go
index 24c04b31..fcb4c07b 100644
--- a/object/provider.go
+++ b/object/provider.go
@@ -63,6 +63,19 @@ func GetProvider(id string) *Provider {
 	return getProvider(owner, name)
 }
 
+func getDefaultEmailProvider() *Provider {
+	provider := Provider{Owner: "admin", Category: "Email"}
+	existed, err := adapter.Engine.Get(&provider)
+	if err != nil {
+		panic(err)
+	}
+
+	if !existed {
+		return nil
+	}
+	return &provider
+}
+
 func UpdateProvider(id string, provider *Provider) bool {
 	owner, name := util.GetOwnerAndNameFromId(id)
 	if getProvider(owner, name) == nil {
diff --git a/object/verification.go b/object/verification.go
index 8ea40f88..59db91c9 100644
--- a/object/verification.go
+++ b/object/verification.go
@@ -29,8 +29,8 @@ type VerificationRecord struct {
 }
 
 func SendVerificationCodeToEmail(remoteAddr, dest string) string {
-	title := "Casdoor Code"
-	sender := "Casdoor Admin"
+	title := "Casdoor Verification Code"
+	sender := "Casdoor"
 	code := getRandomCode(5)
 	content := fmt.Sprintf("You have requested a verification code at Casdoor. Here is your code: %s, please enter in 5 minutes.", code)
 
@@ -38,7 +38,11 @@ func SendVerificationCodeToEmail(remoteAddr, dest string) string {
 		return result
 	}
 
-	if err := SendEmail(title, content, dest, sender); err != nil {
+	msg, err := SendEmail(title, content, dest, sender)
+	if msg != "" {
+		return msg
+	}
+	if err != nil {
 		panic(err)
 	}
 
diff --git a/util/regex.go b/util/regex.go
index 2437c5d7..66430d90 100644
--- a/util/regex.go
+++ b/util/regex.go
@@ -14,18 +14,20 @@
 
 package util
 
-import "regexp"
+import (
+	"net/mail"
+	"regexp"
+)
 
-var reEmail *regexp.Regexp
 var rePhoneCn *regexp.Regexp
 
 func init() {
-	reEmail, _ = regexp.Compile(`^[0-9a-z][_.0-9a-z-]{0,31}@([0-9a-z][0-9a-z-]{0,30}[0-9a-z]\.){1,4}[a-z]{2,4}$`)
 	rePhoneCn, _ = regexp.Compile("^((13[0-9])|(14[5,7])|(15[0-3,5-9])|(17[0,3,5-8])|(18[0-9])|166|191|198|199|(147))\\d{8}$")
 }
 
 func IsEmailValid(email string) bool {
-	return reEmail.MatchString(email)
+	_, err := mail.ParseAddress(email)
+	return err == nil
 }
 
 func IsPhoneCnValid(phone string) bool {