diff --git a/README.md b/README.md
index e78ce8fe9..cbd1f588d 100644
--- a/README.md
+++ b/README.md
@@ -5,7 +5,7 @@ Gogs(Go Git Service) is a GitHub-like clone in the Go Programming Language.
 
 Since we choose to use pure Go implementation of Git manipulation, Gogs certainly supports **ALL platforms**  that Go supports, including Linux, Max OS X, and Windows with **ZERO** dependency.
 
-##### Current version: 0.1.4 Alpha
+##### Current version: 0.1.5 Alpha
 
 ## Purpose
 
diff --git a/conf/app.ini b/conf/app.ini
index 71fe81e83..ecb0d2511 100644
--- a/conf/app.ini
+++ b/conf/app.ini
@@ -61,8 +61,14 @@ USER =
 PASSWD = 
 
 [cache]
+; Either "memory", "redis", or "memcache", default is "memory"
 ADAPTER = memory
-CONFIG = 
+; For "memory" only, GC interval in seconds, default is 60
+INTERVAL = 60
+; For "redis" and "memcache", connection host address
+; redis: ":6039"
+; memcache: "127.0.0.1:11211"
+HOST =
 
 [log]
 ; Either "console", "file", "conn" or "smtp", default is "console"
diff --git a/gogs.go b/gogs.go
index a9f7e6b5c..41df79280 100644
--- a/gogs.go
+++ b/gogs.go
@@ -20,7 +20,7 @@ import (
 // Test that go1.2 tag above is included in builds. main.go refers to this definition.
 const go12tag = true
 
-const APP_VER = "0.1.4.0321"
+const APP_VER = "0.1.5.0321"
 
 func init() {
 	base.AppVer = APP_VER
diff --git a/models/models.go b/models/models.go
index a4550d724..8713ff289 100644
--- a/models/models.go
+++ b/models/models.go
@@ -35,7 +35,6 @@ func LoadModelsConfig() {
 }
 
 func setEngine() {
-
 	var err error
 	switch DbCfg.Type {
 	case "mysql":
diff --git a/modules/base/conf.go b/modules/base/conf.go
index 3962972cd..2c3ecd72d 100644
--- a/modules/base/conf.go
+++ b/modules/base/conf.go
@@ -133,6 +133,30 @@ func newLogService() {
 	log.Info("Log Mode: %s(%s)", strings.Title(mode), levelName)
 }
 
+func newCacheService() {
+	CacheAdapter = Cfg.MustValue("cache", "ADAPTER", "memory")
+
+	switch CacheAdapter {
+	case "memory":
+		CacheConfig = fmt.Sprintf(`{"interval":%d}`, Cfg.MustInt("cache", "INTERVAL", 60))
+	case "redis", "memcache":
+		CacheConfig = fmt.Sprintf(`{"conn":"%s"}`, Cfg.MustValue("cache", "HOST"))
+	default:
+		fmt.Printf("Unknown cache adapter: %s\n", CacheAdapter)
+		os.Exit(2)
+	}
+
+	var err error
+	Cache, err = cache.NewCache(CacheAdapter, CacheConfig)
+	if err != nil {
+		fmt.Printf("Init cache system failed, adapter: %s, config: %s, %v\n",
+			CacheAdapter, CacheConfig, err)
+		os.Exit(2)
+	}
+
+	log.Info("Cache Service Enabled")
+}
+
 func newMailService() {
 	// Check mailer setting.
 	if Cfg.MustBool("mailer", "ENABLED") {
@@ -188,16 +212,6 @@ func NewConfigContext() {
 	SecretKey = Cfg.MustValue("security", "SECRET_KEY")
 	RunUser = Cfg.MustValue("", "RUN_USER")
 
-	CacheAdapter = Cfg.MustValue("cache", "ADAPTER")
-	CacheConfig = Cfg.MustValue("cache", "CONFIG")
-
-	Cache, err = cache.NewCache(CacheAdapter, CacheConfig)
-	if err != nil {
-		fmt.Printf("Init cache system failed, adapter: %s, config: %s, %v\n",
-			CacheAdapter, CacheConfig, err)
-		os.Exit(2)
-	}
-
 	// Determine and create root git reposiroty path.
 	RepoRootPath = Cfg.MustValue("repository", "ROOT")
 	if err = os.MkdirAll(RepoRootPath, os.ModePerm); err != nil {
@@ -209,6 +223,7 @@ func NewConfigContext() {
 func NewServices() {
 	newService()
 	newLogService()
+	newCacheService()
 	newMailService()
 	newRegisterMailService()
 }
diff --git a/routers/admin/admin.go b/routers/admin/admin.go
index 6d3831a9f..d70af3c50 100644
--- a/routers/admin/admin.go
+++ b/routers/admin/admin.go
@@ -67,5 +67,8 @@ func Config(ctx *middleware.Context) {
 		ctx.Data["Mailer"] = base.MailService
 	}
 
+	ctx.Data["CacheAdapter"] = base.CacheAdapter
+	ctx.Data["CacheConfig"] = base.CacheConfig
+
 	ctx.HTML(200, "admin/config")
 }
diff --git a/routers/user/user.go b/routers/user/user.go
index 40b594ab8..d38eb1ceb 100644
--- a/routers/user/user.go
+++ b/routers/user/user.go
@@ -167,6 +167,10 @@ func SignUp(ctx *middleware.Context, form auth.RegisterForm) {
 		ctx.Data["Email"] = u.Email
 		ctx.Data["Hours"] = base.Service.ActiveCodeLives / 60
 		ctx.HTML(200, "user/active")
+
+		if err = ctx.Cache.Put("MailResendLimit_"+u.LowerName, u.LowerName, 180); err != nil {
+			log.Error("Set cache(MailResendLimit) fail: %v", err)
+		}
 		return
 	}
 	ctx.Redirect("/user/login")
@@ -247,8 +251,12 @@ func Activate(ctx *middleware.Context) {
 		}
 		// Resend confirmation e-mail.
 		if base.Service.RegisterEmailConfirm {
-			ctx.Data["Hours"] = base.Service.ActiveCodeLives / 60
-			mailer.SendActiveMail(ctx.Render, ctx.User)
+			if ctx.Cache.IsExist("MailResendLimit_" + ctx.User.LowerName) {
+				ctx.Data["ResendLimited"] = true
+			} else {
+				ctx.Data["Hours"] = base.Service.ActiveCodeLives / 60
+				mailer.SendActiveMail(ctx.Render, ctx.User)
+			}
 		} else {
 			ctx.Data["ServiceNotEnabled"] = true
 		}
diff --git a/templates/admin/config.tmpl b/templates/admin/config.tmpl
index 7013c201a..ad32ec3fb 100644
--- a/templates/admin/config.tmpl
+++ b/templates/admin/config.tmpl
@@ -63,6 +63,17 @@
                 <div><b>User:</b> {{.Mailer.User}}</div>
             </div>
         </div>
+
+        <div class="panel panel-default">
+            <div class="panel-heading">
+                Cache Configuration
+            </div>
+
+            <div class="panel-body">
+                <div><b>Cache Adapter:</b> {{.CacheAdapter}}</div>
+                <div><b>Cache Config:</b> <code>{{.CacheConfig}}</code></div>
+            </div>
+        </div>
     </div>
 </div>
 {{template "base/footer" .}}
\ No newline at end of file
diff --git a/templates/user/active.tmpl b/templates/user/active.tmpl
index fefd7d3ae..47c87a591 100644
--- a/templates/user/active.tmpl
+++ b/templates/user/active.tmpl
@@ -6,6 +6,8 @@
         {{if .IsActivatePage}}
             {{if .ServiceNotEnabled}}
             <p>Sorry, Register Mail Confirmation has been disabled.</p>
+            {{else if .ResendLimited}}
+            <p>Sorry, you are sending activation e-mail too frequently, please wait 3 minutes.</p>
             {{else}}
             <p>New confirmation e-mail has been sent to <b>{{.SignedUser.Email}}</b>, please check your inbox within {{.Hours}} hours to complete your registeration.</p>
             <hr/>