diff --git a/server/mailserver/mail/mail.go b/server/mailserver/mail/mail.go
index 689d2fce..79b4ac2c 100644
--- a/server/mailserver/mail/mail.go
+++ b/server/mailserver/mail/mail.go
@@ -2,6 +2,7 @@ package mail
 
 import (
 	"f5"
+	"sync"
 	//"main/common"
 	//"main/constant"
 	//"q5"
@@ -14,6 +15,7 @@ type attachment struct {
 }
 
 type mail struct {
+	lock sync.Mutex
 	mailId int64
 	mailType int32
 	subject string
@@ -31,6 +33,14 @@ func (this *mail) init() {
 
 }
 
+func (this *mail) Lock() {
+	this.lock.Lock()
+}
+
+func (this *mail) Unlock() {
+	this.lock.Unlock()
+}
+
 func (this *mail) loadFromDb(ds *f5.DataSet) {
 
 }