diff --git a/server/mailserver/app/app.go b/server/mailserver/app/app.go
index fca4ce3c..3dcef813 100644
--- a/server/mailserver/app/app.go
+++ b/server/mailserver/app/app.go
@@ -1,23 +1,14 @@
 package app
 
 import (
-	"crypto/md5"
-	"encoding/hex"
 	"f5"
-	"fmt"
 	"main/constant"
-	"math/rand"
 	"mt"
-	"sync"
-	"time"
 )
 
 type app struct {
 	initCb        func()
 	unInitCb      func()
-	sessionLock   sync.Mutex
-	sessionHash   map[string]string
-	accountIdHash map[string]string
 }
 
 func (this *app) GetPkgName() string {
@@ -37,8 +28,6 @@ func (this *app) Run(initCb func(), unInitCb func()) {
 func (this *app) Init() {
 	f5.LoadMetaTable(mt.Table)
 	this.registerDataSources()
-	this.sessionHash = make(map[string]string)
-	this.accountIdHash = make(map[string]string)
 	this.initCb()
 }
 
@@ -59,45 +48,3 @@ func (this *app) registerDataSources() {
 		mt.Table.MailDb.GetById(0).GetDatabase(),
 		30)
 }
-
-func (this *app) AddSession(accountId string) string {
-	this.sessionLock.Lock()
-	defer this.sessionLock.Unlock()
-	uuid := f5.GetApp().NewUuid()
-	str := fmt.Sprintf("%s%d%s%d", accountId, uuid, randStringBytes(12), time.Now().Unix())
-	md5New := md5.New()
-	strByte := []byte(str)
-	md5New.Write(strByte)
-	md5String := hex.EncodeToString(md5New.Sum(nil))
-	token := accountId + "|" + md5String
-	this.sessionHash[accountId] = token
-	return token
-}
-
-const letterBytes = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
-
-func randStringBytes(n int) string {
-	b := make([]byte, n)
-	for i := range b {
-		b[i] = letterBytes[rand.Intn(len(letterBytes))]
-	}
-	return string(b)
-}
-
-func (this *app) GetSessionAccountId(accountId string) string {
-	this.sessionLock.Lock()
-	defer this.sessionLock.Unlock()
-	if session, ok := this.sessionHash[accountId]; ok {
-		return session
-	} else {
-		return "nil"
-	}
-}
-
-func (this *app) RemoveSession(accountId string) {
-	this.sessionLock.Lock()
-	defer this.sessionLock.Unlock()
-	if _, ok := this.sessionHash[accountId]; ok {
-		delete(this.sessionHash, accountId)
-	}
-}
diff --git a/server/mailserver/common/types.go b/server/mailserver/common/types.go
index 23a1505b..cc44a038 100644
--- a/server/mailserver/common/types.go
+++ b/server/mailserver/common/types.go
@@ -2,9 +2,6 @@ package common
 
 type App interface {
 	Run(func(), func())
-	AddSession(accountId string) string
-	GetSessionAccountId(accountId string) string
-	RemoveSession(accountId string)
 }
 
 type Player interface {