diff --git a/server/mailman/game2005.go b/server/mailman/game2005.go
index 7fd7b48..978e03c 100644
--- a/server/mailman/game2005.go
+++ b/server/mailman/game2005.go
@@ -3,6 +3,7 @@ package main
 import (
 	"sync"
 	"sync/atomic"
+	"fmt"
 	"q5"
 	"f5"
 )
@@ -148,7 +149,8 @@ func (this *Game2005) internalSendMail(to string,
 	subject string,
 	sendTime int32,
 	expireTime int32,
-	attachments string) bool {
+	attachments string,
+	uniqueKey string) bool {
 	gameMailApiUrl := "https://gamemail.kingsome.cn/webapp/index.php"
 	if !f5.IsOnlineEnv() {
 		gameMailApiUrl = "https://gamemail-test.kingsome.cn/webapp/index.php"
@@ -166,6 +168,7 @@ func (this *Game2005) internalSendMail(to string,
 	params.SetXValue("sendtime", q5.NewXInt32(sendTime))
 	params.SetXValue("expiretime", q5.NewXInt32(expireTime))
 	params.SetXValue("attachments", q5.NewXString(attachments))
+	params.SetXValue("unique_key", q5.NewXString(uniqueKey))
 	respObj, respStr, err := q5.HttpGetAsJson(gameMailApiUrl, params.AsXObject())
 	if err != nil {
 		f5.SysLog().Warning("url:%s resp:%s", gameMailApiUrl, respStr)
@@ -182,6 +185,7 @@ func (this *Game2005) internalSendMail(to string,
 func (this *Game2005) SendVipLvUpMail(accountId string, oldLv int32, newLv int32, upTime int32) bool {
 	mailMeta := this.vipLvUpMailMeta
 	for vipLv := oldLv + 1; vipLv <= newLv; vipLv++ {
+		uniqueKey := fmt.Sprintf("vipLvUp_%d_%s", vipLv, accountId)
 		ok := this.internalSendMail(
 			accountId,
 			-2,
@@ -189,7 +193,8 @@ func (this *Game2005) SendVipLvUpMail(accountId string, oldLv int32, newLv int32
 			mailMeta.GetSubject(),
 			upTime,
 			upTime + 3600 * 24 * 30,
-			mailMeta.GetAttachmentsByLv(vipLv))
+			mailMeta.GetAttachmentsByLv(vipLv),
+			uniqueKey)
 		if !ok {
 			return false
 		}
@@ -199,6 +204,7 @@ func (this *Game2005) SendVipLvUpMail(accountId string, oldLv int32, newLv int32
 
 func (this *Game2005) SendPriviDailyMail(accountId string, priviLv int32, sendTime int32) bool {
 	mailMeta := this.priviDailyMailMeta
+	uniqueKey := fmt.Sprintf("priviDaily_%s_%s", q5.FormatUnixDateEx(int64(sendTime)), accountId)
 	ok := this.internalSendMail(
 		accountId,
 		-3,
@@ -206,12 +212,14 @@ func (this *Game2005) SendPriviDailyMail(accountId string, priviLv int32, sendTi
 		mailMeta.GetSubject(),
 		sendTime,
 		sendTime + 3600 * 24 * 30,
-		mailMeta.GetAttachmentsByLv(priviLv))
+		mailMeta.GetAttachmentsByLv(priviLv),
+		uniqueKey)
 	return ok
 }
 
 func (this *Game2005) SendVipWeeklyMail(accountId string, vipLv int32, sendTime int32) bool {
 	mailMeta := this.vipWeeklyMailMeta
+	uniqueKey := fmt.Sprintf("vipWeekly_%s_%s", q5.FormatUnixDateEx(int64(sendTime)), accountId)
 	ok := this.internalSendMail(
 		accountId,
 		-4,
@@ -219,7 +227,8 @@ func (this *Game2005) SendVipWeeklyMail(accountId string, vipLv int32, sendTime
 		mailMeta.GetSubject(),
 		sendTime,
 		sendTime + 3600 * 24 * 30,
-		mailMeta.GetAttachmentsByLv(vipLv))
+		mailMeta.GetAttachmentsByLv(vipLv),
+		uniqueKey)
 	return ok
 }
 
diff --git a/third_party/q5 b/third_party/q5
index 70271a1..a7c34b4 160000
--- a/third_party/q5
+++ b/third_party/q5
@@ -1 +1 @@
-Subproject commit 70271a1b60abea42e643a8b54ca73a4d1e4a044b
+Subproject commit a7c34b44d7244328b94beae4a3379ee4cdcc4def