diff --git a/etc/emqx.conf b/etc/emqx.conf
index deb702211..3604f2efd 100644
--- a/etc/emqx.conf
+++ b/etc/emqx.conf
@@ -1207,6 +1207,11 @@ listener.ssl.external.reuseaddr = true
 ## Examples: 8083, 127.0.0.1:8083, ::1:8083
 listener.ws.external = 8083
 
+## The path of WebSocket MQTT endpoint
+##
+## Value: URL Path
+listener.ws.external.mqtt_path = /mqtt
+
 ## The acceptor pool for external MQTT/WebSocket listener.
 ##
 ## Value: Number
@@ -1346,6 +1351,11 @@ listener.ws.external.nodelay = true
 ## Examples: 8084, 127.0.0.1:8084, ::1:8084
 listener.wss.external = 8084
 
+## The path of WebSocket MQTT endpoint
+##
+## Value: URL Path
+listener.wss.external.mqtt_path = /mqtt
+
 ## The acceptor pool for external MQTT/WebSocket/SSL listener.
 ##
 ## Value: Number
@@ -1829,7 +1839,7 @@ module.rewrite = off
 ## The etc dir for plugins' config.
 ##
 ## Value: Folder
-plugins.etc_dir ={{ platform_etc_dir }}/plugins/
+plugins.etc_dir = {{ platform_etc_dir }}/plugins/
 
 ## The file to store loaded plugin names.
 ##
diff --git a/priv/emqx.schema b/priv/emqx.schema
index e9f4932c4..a8ed316c2 100644
--- a/priv/emqx.schema
+++ b/priv/emqx.schema
@@ -1094,6 +1094,11 @@ end}.
   {datatype, [integer, ip]}
 ]}.
 
+{mapping, "listener.ws.$name.mqtt_path", "emqx.listeners", [
+  {default, "/mqtt"},
+  {datatype, string}
+]}.
+
 {mapping, "listener.ws.$name.acceptors", "emqx.listeners", [
   {default, 8},
   {datatype, integer}
@@ -1195,6 +1200,11 @@ end}.
   {datatype, [integer, ip]}
 ]}.
 
+{mapping, "listener.wss.$name.mqtt_path", "emqx.listeners", [
+  {default, "/mqtt"},
+  {datatype, string}
+]}.
+
 {mapping, "listener.wss.$name.acceptors", "emqx.listeners", [
   {default, 8},
   {datatype, integer}
@@ -1365,7 +1375,8 @@ end}.
                 end,
 
     LisOpts = fun(Prefix) ->
-                  Filter([{acceptors,   cuttlefish:conf_get(Prefix ++ ".acceptors", Conf)},
+                  Filter([{acceptors, cuttlefish:conf_get(Prefix ++ ".acceptors", Conf)},
+                          {mqtt_path, cuttlefish:conf_get(Prefix ++ ".mqtt_path", Conf, undefined)},
                           {max_connections, cuttlefish:conf_get(Prefix ++ ".max_connections", Conf)},
                           {max_conn_rate, cuttlefish:conf_get(Prefix ++ ".max_conn_rate", Conf, undefined)},
                           {tune_buffer, cuttlefish:conf_get(Prefix ++ ".tune_buffer", Conf, undefined)},
diff --git a/src/emqx_listeners.erl b/src/emqx_listeners.erl
index 421304f3a..d3ef43069 100644
--- a/src/emqx_listeners.erl
+++ b/src/emqx_listeners.erl
@@ -51,12 +51,12 @@ start_listener(Proto, ListenOn, Options) when Proto == ssl; Proto == tls ->
 
 %% Start MQTT/WS listener
 start_listener(Proto, ListenOn, Options) when Proto == http; Proto == ws ->
-    Dispatch = cowboy_router:compile([{'_', [{"/mqtt", emqx_ws_connection, Options}]}]),
+    Dispatch = cowboy_router:compile([{'_', [{mqtt_path(Options), emqx_ws_connection, Options}]}]),
     start_http_listener(fun cowboy:start_clear/3, 'mqtt:ws', ListenOn, ranch_opts(Options), Dispatch);
 
 %% Start MQTT/WSS listener
 start_listener(Proto, ListenOn, Options) when Proto == https; Proto == wss ->
-    Dispatch = cowboy_router:compile([{'_', [{"/mqtt",  emqx_ws_connection, Options}]}]),
+    Dispatch = cowboy_router:compile([{'_', [{mqtt_path(Options),  emqx_ws_connection, Options}]}]),
     start_http_listener(fun cowboy:start_tls/3, 'mqtt:wss', ListenOn, ranch_opts(Options), Dispatch).
 
 start_mqtt_listener(Name, ListenOn, Options) ->
@@ -67,6 +67,9 @@ start_mqtt_listener(Name, ListenOn, Options) ->
 start_http_listener(Start, Name, ListenOn, RanchOpts, Dispatch) ->
     Start(Name, with_port(ListenOn, RanchOpts), #{env => #{dispatch => Dispatch}}).
 
+mqtt_path(Options) ->
+    proplists:get_value(mqtt_path, Options, "/mqtt").
+
 ranch_opts(Options) ->
     NumAcceptors = proplists:get_value(acceptors, Options, 4),
     MaxConnections = proplists:get_value(max_connections, Options, 1024),
diff --git a/src/emqx_message.erl b/src/emqx_message.erl
index 311bd58dd..91e5d4d59 100644
--- a/src/emqx_message.erl
+++ b/src/emqx_message.erl
@@ -22,7 +22,7 @@
 -export([get_flag/2, get_flag/3, set_flag/2, set_flag/3, unset_flag/2]).
 -export([set_headers/2]).
 -export([get_header/2, get_header/3, set_header/3]).
--export([is_expired/1, check_expiry/1, check_expiry/2, update_expiry/1]).
+-export([is_expired/1, update_expiry/1]).
 -export([format/1]).
 
 -type(flag() :: atom()).
@@ -100,21 +100,6 @@ is_expired(#message{headers = #{'Message-Expiry-Interval' := Interval}, timestam
 is_expired(_Msg) ->
     false.
 
--spec(check_expiry(emqx_types:message()) -> {ok, pos_integer()} | expired | false).
-check_expiry(Msg = #message{timestamp = CreatedAt}) ->
-    check_expiry(Msg, CreatedAt);
-check_expiry(_Msg) ->
-    false.
-
--spec(check_expiry(emqx_types:message(), erlang:timestamp()) -> {ok, pos_integer()} | expired | false).
-check_expiry(#message{headers = #{'Message-Expiry-Interval' := Interval}}, Since) ->
-    case Interval - (elapsed(Since) div 1000) of
-        Timeout when Timeout > 0 -> {ok, Timeout};
-        _ -> expired
-    end;
-check_expiry(_Msg, _Since) ->
-    false.
-
 update_expiry(Msg = #message{headers = #{'Message-Expiry-Interval' := Interval}, timestamp = CreatedAt}) ->
     case elapsed(CreatedAt) of
         Elapsed when Elapsed > 0 ->
@@ -138,4 +123,3 @@ format(flags, Flags) ->
     io_lib:format("~p", [[Flag || {Flag, true} <- maps:to_list(Flags)]]);
 format(headers, Headers) ->
     io_lib:format("~p", [Headers]).
-
diff --git a/test/emqx_message_SUITE.erl b/test/emqx_message_SUITE.erl
index c2ca0f0aa..37207e40c 100644
--- a/test/emqx_message_SUITE.erl
+++ b/test/emqx_message_SUITE.erl
@@ -29,7 +29,7 @@ all() ->
         message_flag,
         message_header,
         message_format,
-        message_expired 
+        message_expired
     ].
 
 message_make(_) ->
@@ -53,7 +53,7 @@ message_flag(_) ->
     ?assert(emqx_message:get_flag(dup, Msg6)),
     ?assert(emqx_message:get_flag(retain, Msg6)).
 
-message_header(_) -> 
+message_header(_) ->
     Msg = emqx_message:make(<<"clientid">>, <<"topic">>, <<"payload">>),
     Msg1 = emqx_message:set_headers(#{a => 1, b => 2}, Msg),
     Msg2 = emqx_message:set_header(c, 3, Msg1),
@@ -68,11 +68,8 @@ message_expired(_) ->
     Msg1 = emqx_message:set_headers(#{'Message-Expiry-Interval' => 1}, Msg),
     timer:sleep(500),
     ?assertNot(emqx_message:is_expired(Msg1)),
-    {ok, 1} = emqx_message:check_expiry(Msg1),
     timer:sleep(600),
     ?assert(emqx_message:is_expired(Msg1)),
-    expired = emqx_message:check_expiry(Msg1),
     timer:sleep(1000),
     Msg2 = emqx_message:update_expiry(Msg1),
     ?assertEqual(1, emqx_message:get_header('Message-Expiry-Interval', Msg2)).
-