diff --git a/logs/console_test.go b/logs/console_test.go
index 5ce0b1e1..f177e919 100644
--- a/logs/console_test.go
+++ b/logs/console_test.go
@@ -6,6 +6,7 @@ import (
 
 func TestConsole(t *testing.T) {
 	log := NewLogger(10000)
+	log.SetLogger("console", "")
 	log.Trace("trace")
 	log.Info("info")
 	log.Warn("warning")
@@ -19,3 +20,11 @@ func TestConsole(t *testing.T) {
 	log.Debug("debug")
 	log.Critical("critical")
 }
+
+func BenchmarkConsole(b *testing.B) {
+	log := NewLogger(10000)
+	log.SetLogger("console", "")
+	for i := 0; i < b.N; i++ {
+		log.Trace("trace")
+	}
+}
diff --git a/logs/file_test.go b/logs/file_test.go
index c9b99eef..8f50276d 100644
--- a/logs/file_test.go
+++ b/logs/file_test.go
@@ -99,3 +99,12 @@ func exists(path string) (bool, error) {
 	}
 	return false, err
 }
+
+func BenchmarkFile(b *testing.B) {
+	log := NewLogger(100000)
+	log.SetLogger("file", `{"filename":"test4.log"}`)
+	for i := 0; i < b.N; i++ {
+		log.Trace("trace")
+	}
+	os.Remove("test4.log")
+}
diff --git a/logs/log.go b/logs/log.go
index 8a9ac3c0..47fa906c 100644
--- a/logs/log.go
+++ b/logs/log.go
@@ -54,7 +54,7 @@ func NewLogger(channellen int64) *BeeLogger {
 	bl := new(BeeLogger)
 	bl.msg = make(chan *logMsg, channellen)
 	bl.outputs = make(map[string]LoggerInterface)
-	bl.SetLogger("console", "") // default output to console
+	//bl.SetLogger("console", "") // default output to console
 	go bl.StartLogger()
 	return bl
 }
diff --git a/logs/smtp.go b/logs/smtp.go
index 19a03337..ecc33aa5 100644
--- a/logs/smtp.go
+++ b/logs/smtp.go
@@ -3,8 +3,10 @@ package logs
 import (
 	"encoding/json"
 	"errors"
+	"fmt"
 	"net/smtp"
 	"strings"
+	"time"
 )
 
 const (
@@ -77,7 +79,8 @@ func (s *SmtpWriter) WriteMsg(msg string, level int) error {
 	// and send the email all in one step.
 	content_type := "Content-Type: text/plain" + "; charset=UTF-8"
 	mailmsg := []byte("To: " + strings.Join(s.recipientAddresses, ";") + "\r\nFrom: " + s.username + "<" + s.username +
-		">\r\nSubject: " + s.subject + "\r\n" + content_type + "\r\n\r\n" + msg)
+		">\r\nSubject: " + s.subject + "\r\n" + content_type + "\r\n\r\n" + fmt.Sprintf(".%s", time.Now().Format("2006-01-02 15:04:05")) + msg)
+
 	err := smtp.SendMail(
 		s.host,
 		auth,
@@ -85,6 +88,7 @@ func (s *SmtpWriter) WriteMsg(msg string, level int) error {
 		s.recipientAddresses,
 		mailmsg,
 	)
+
 	return err
 }
 
diff --git a/logs/smtp_test.go b/logs/smtp_test.go
index c391c6ab..b01c5fb7 100644
--- a/logs/smtp_test.go
+++ b/logs/smtp_test.go
@@ -6,6 +6,6 @@ import (
 
 func TestSmtp(t *testing.T) {
 	log := NewLogger(10000)
-	log.SetLogger("smtp", `{"username":"xxxxxx@gmail.com","password":"xxxxxxx","host":"smtp.gmail.com:587","sendTos":["xiemengjun@gmail.com"]}`)
+	log.SetLogger("smtp", `{"username":"beegotest@gmail.com","password":"xxxxxxxx","host":"smtp.gmail.com:587","sendTos":["xiemengjun@gmail.com"]}`)
 	log.Critical("sendmail critical")
 }