diff --git a/models/login.go b/models/login.go
index aa82eb0036..005a1f5b76 100644
--- a/models/login.go
+++ b/models/login.go
@@ -5,6 +5,7 @@
 package models
 
 import (
+	"crypto/tls"
 	"encoding/json"
 	"errors"
 	"fmt"
@@ -133,7 +134,7 @@ func AddSource(source *LoginSource) error {
 }
 
 func UpdateSource(source *LoginSource) error {
-	_, err := orm.AllCols().Id(source.Id).Update(source)
+	_, err := orm.Id(source.Id).AllCols().Update(source)
 	return err
 }
 
@@ -197,7 +198,7 @@ func LoginUser(uname, passwd string) (*User, error) {
 					if err == nil {
 						return u, nil
 					} else {
-						log.Warn("try ldap login", source.Name, "by", uname, "error:", err)
+						log.Warn("Fail to login(%s) by LDAP(%s): %v", uname, source.Name, err)
 					}
 				} else if source.Type == LT_SMTP {
 					u, err := LoginUserSMTPSource(nil, uname, passwd,
@@ -205,7 +206,7 @@ func LoginUser(uname, passwd string) (*User, error) {
 					if err == nil {
 						return u, nil
 					} else {
-						log.Warn("try smtp login", source.Name, "by", uname, "error:", err)
+						log.Warn("Fail to login(%s) by SMTP(%s): %v", uname, source.Name, err)
 					}
 				}
 			}
@@ -217,12 +218,9 @@ func LoginUser(uname, passwd string) (*User, error) {
 		hasSource, err := orm.Id(u.LoginSource).Get(&source)
 		if err != nil {
 			return nil, err
-		}
-		if !hasSource {
+		} else if !hasSource {
 			return nil, ErrLoginSourceNotExist
-		}
-
-		if !source.IsActived {
+		} else if !source.IsActived {
 			return nil, ErrLoginSourceNotActived
 		}
 
@@ -296,20 +294,25 @@ var (
 	SMTPAuths  = []string{SMTP_PLAIN, SMTP_LOGIN}
 )
 
-func SmtpAuth(addr string, a smtp.Auth, tls bool) error {
-	c, err := smtp.Dial(addr)
+func SmtpAuth(host string, port int, a smtp.Auth, useTls bool) error {
+	c, err := smtp.Dial(fmt.Sprintf("%s:%d", host, port))
 	if err != nil {
 		return err
 	}
 	defer c.Close()
 
-	if tls {
+	if err = c.Hello("gogs"); err != nil {
+		return err
+	}
+
+	if useTls {
 		if ok, _ := c.Extension("STARTTLS"); ok {
-			if err = c.StartTLS(nil); err != nil {
+			config := &tls.Config{ServerName: host}
+			if err = c.StartTLS(config); err != nil {
 				return err
 			}
 		} else {
-			return errors.New("smtp server unsupported tls")
+			return errors.New("SMTP server unsupported TLS")
 		}
 	}
 
@@ -333,11 +336,13 @@ func LoginUserSMTPSource(user *User, name, passwd string, sourceId int64, cfg *S
 	} else if cfg.Auth == SMTP_LOGIN {
 		auth = LoginAuth(name, passwd)
 	} else {
-		return nil, errors.New("Unsupported smtp auth type")
+		return nil, errors.New("Unsupported SMTP auth type")
 	}
 
-	err := SmtpAuth(fmt.Sprintf("%s:%d", cfg.Host, cfg.Port), auth, cfg.TLS)
-	if err != nil {
+	if err := SmtpAuth(cfg.Host, cfg.Port, auth, cfg.TLS); err != nil {
+		if strings.Contains(err.Error(), "Username and Password not accepted") {
+			return nil, ErrUserNotExist
+		}
 		return nil, err
 	}
 
diff --git a/models/user.go b/models/user.go
index c5c474ee6f..dd0498501f 100644
--- a/models/user.go
+++ b/models/user.go
@@ -34,7 +34,7 @@ var (
 	ErrUserNameIllegal       = errors.New("User name contains illegal characters")
 	ErrLoginSourceNotExist   = errors.New("Login source does not exist")
 	ErrLoginSourceNotActived = errors.New("Login source is not actived")
-	ErrUnsupportedLoginType  = errors.New("Login source is unknow")
+	ErrUnsupportedLoginType  = errors.New("Login source is unknown")
 )
 
 // User represents the object of individual and member of organization.
diff --git a/modules/mailer/mailer.go b/modules/mailer/mailer.go
index 63861d870e..a293beb15b 100644
--- a/modules/mailer/mailer.go
+++ b/modules/mailer/mailer.go
@@ -72,16 +72,14 @@ func Send(msg *Message) (int, error) {
 	// get message body
 	content := msg.Content()
 
-	auth := smtp.PlainAuth("", base.MailService.User, base.MailService.Passwd, host[0])
-
 	if len(msg.To) == 0 {
 		return 0, fmt.Errorf("empty receive emails")
-	}
-
-	if len(msg.Body) == 0 {
+	} else if len(msg.Body) == 0 {
 		return 0, fmt.Errorf("empty email body")
 	}
 
+	auth := smtp.PlainAuth("", base.MailService.User, base.MailService.Passwd, host[0])
+
 	if msg.Massive {
 		// send mail to multiple emails one by one
 		num := 0
diff --git a/routers/admin/auths.go b/routers/admin/auths.go
index bf4bade17b..c4702afc81 100644
--- a/routers/admin/auths.go
+++ b/routers/admin/auths.go
@@ -158,7 +158,7 @@ func EditAuthSourcePost(ctx *middleware.Context, form auth.AuthenticationForm) {
 	}
 
 	log.Trace("%s Authentication changed by admin(%s): %s", ctx.Req.RequestURI,
-		ctx.User.LowerName, strings.ToLower(form.AuthName))
+		ctx.User.LowerName, form.AuthName)
 
 	ctx.Redirect("/admin/auths")
 }
diff --git a/templates/admin/auths.tmpl b/templates/admin/auths.tmpl
index 87baeafd62..a0f7ba9790 100644
--- a/templates/admin/auths.tmpl
+++ b/templates/admin/auths.tmpl
@@ -19,7 +19,7 @@
                             <th>Actived</th>
                             <th>Updated</th>
                             <th>Created</th>
-                            <th>Operation</th>
+                            <th>Edit</th>
                         </tr>
                     </thead>
                     <tbody>
diff --git a/templates/admin/auths/edit.tmpl b/templates/admin/auths/edit.tmpl
index f2ba68fd27..5747c1ab51 100644
--- a/templates/admin/auths/edit.tmpl
+++ b/templates/admin/auths/edit.tmpl
@@ -115,16 +115,20 @@
                             <input name="smtpport" class="form-control" placeholder="Type port number" value="{{.Source.SMTP.Port}}">
                         </div>
                     </div>
-
-                    <!-- <div class="form-group {{if .Err_TLS}}has-error has-feedback{{end}}">
-                        <label class="col-md-3 control-label">TLS: </label>
-                        <div class="col-md-7">
-                            <input name="tls" type="checkbox" class="form-control" {{if .Source.SMTP.TLS}}checked{{end}}>
-                        </div>
-                    </div> -->
                     {{end}}
 
                     <div class="form-group">
+                        {{if eq $type 3}}
+                        <div class="col-md-offset-3 col-md-7">
+                            <div class="checkbox">
+                                <label>
+                                <input name="tls" type="checkbox" class="form-control" {{if .Source.SMTP.TLS}}checked{{end}}>
+                                    <strong>Enable TLS Encryption</strong>
+                                </label>
+                            </div>
+                        </div>
+                        {{end}}
+
                         <div class="col-md-offset-3 col-md-7">
                             <div class="checkbox">
                                 <label>
diff --git a/templates/admin/auths/new.tmpl b/templates/admin/auths/new.tmpl
index f9d9892f61..6045f1c532 100644
--- a/templates/admin/auths/new.tmpl
+++ b/templates/admin/auths/new.tmpl
@@ -114,16 +114,16 @@
                             </div>
                         </div>
 
-                        <!-- <div class="form-group">
+                        <div class="form-group">
                             <div class="col-md-offset-3 col-md-7">
                                 <div class="checkbox">
                                     <label>
                                         <input name="tls" type="checkbox" {{if .tls}}checked{{end}}>
-                                        <strong>Enable Register Confirmation</strong>
+                                        <strong>Enable TLS Encryption</strong>
                                     </label>
                                 </div>
                             </div>
-                        </div> -->
+                        </div>
                     </div>
 
                     <div class="form-group">
@@ -148,6 +148,16 @@
             </div>
         </div>
 
+        <div class="panel panel-info">
+            <div class="panel-heading">
+                Tips
+            </div>
+
+            <div class="panel-body">
+                <h5>GMail Setting:</h5>
+                <p>Host: smtp.gmail.com, Post: 587, Enable TLS Encryption: true</p>
+            </div>
+        </div>
 	</div>
 </div>
 <script>
diff --git a/templates/admin/users/edit.tmpl b/templates/admin/users/edit.tmpl
index 4995856768..b1fffb69c3 100644
--- a/templates/admin/users/edit.tmpl
+++ b/templates/admin/users/edit.tmpl
@@ -29,7 +29,7 @@
 					<div class="form-group">
 					    <label class="col-md-3 control-label">Auth Login Name: </label>
 					    <div class="col-md-7">
-							<input name="loginname" class="form-control" placeholder="Type auth login's username" value="{{.loginname}}">
+							<input name="loginname" class="form-control" placeholder="Type auth login's username" value="{{.User.LoginName}}">
 						</div>
 					</div>