diff --git a/indra/newview/app_settings/commands.xml b/indra/newview/app_settings/commands.xml
index cab0c523b2300fd335e77843f59c1259bfea8e98..dae397a3b6c74ed90134f34afa4bcaf0bc75813b 100644
--- a/indra/newview/app_settings/commands.xml
+++ b/indra/newview/app_settings/commands.xml
@@ -150,16 +150,6 @@
            is_running_function="Floater.IsOpen"
            is_running_parameters="moveview"
            />
-  <command name="outbox"
-           available_in_toybox="false"
-           icon="Command_Outbox_Icon"
-           label_ref="Command_Outbox_Label"
-           tooltip_ref="Command_Outbox_Tooltip"
-           execute_function="Floater.ToggleOrBringToFront"
-           execute_parameters="outbox"
-           is_running_function="Floater.IsOpen"
-           is_running_parameters="outbox"
-           />
   <command name="people"
            available_in_toybox="true"
            icon="Command_People_Icon"
diff --git a/indra/newview/app_settings/settings.xml b/indra/newview/app_settings/settings.xml
index b4919c6e4851dc29480fd6a23136ac07570b49c3..2cd19da0c6045f70ff102c4b61708500a5a676fe 100644
--- a/indra/newview/app_settings/settings.xml
+++ b/indra/newview/app_settings/settings.xml
@@ -4913,7 +4913,7 @@
     <key>InventoryOutboxDisplayBoth</key>
     <map>
         <key>Comment</key>
-        <string>Show the legacy Merchant Outbox UI as well as the Marketplace Listings UI</string>
+        <string>(Deprecated) Show the legacy Merchant Outbox UI as well as the Marketplace Listings UI</string>
         <key>Persist</key>
         <integer>1</integer>
         <key>Type</key>
diff --git a/indra/newview/llinventorypanel.cpp b/indra/newview/llinventorypanel.cpp
index d4993a1091a2cfa225a031e016d1a69faccc55e5..6f461673ee0580752b9b88a9b35aae8e057e97f0 100644
--- a/indra/newview/llinventorypanel.cpp
+++ b/indra/newview/llinventorypanel.cpp
@@ -291,7 +291,6 @@ void LLInventoryPanel::initFromParams(const LLInventoryPanel::Params& params)
 	if (!gSavedSettings.getBOOL("InventoryOutboxMakeVisible"))
 	{
 		getFilter().setFilterCategoryTypes(getFilter().getFilterCategoryTypes() & ~(1ULL << LLFolderType::FT_INBOX));
-		getFilter().setFilterCategoryTypes(getFilter().getFilterCategoryTypes() & ~(1ULL << LLFolderType::FT_OUTBOX));
 	}
     // hide marketplace listing box, unless we are a marketplace panel
 	if (!gSavedSettings.getBOOL("InventoryOutboxMakeVisible") && !mParams.use_marketplace_folders)
diff --git a/indra/newview/lltooldraganddrop.cpp b/indra/newview/lltooldraganddrop.cpp
index f66211ef3462e77525e20680cb19bc616f112489..7d77a8983f7de8b9ec32d22fa838230922ddebf2 100644
--- a/indra/newview/lltooldraganddrop.cpp
+++ b/indra/newview/lltooldraganddrop.cpp
@@ -1728,6 +1728,7 @@ EAcceptance LLToolDragAndDrop::dad3dRezAttachmentFromInv(
 	const LLUUID &outbox_id = gInventory.findCategoryUUIDForType(LLFolderType::FT_OUTBOX, false);
 	if(gInventory.isObjectDescendentOf(item->getUUID(), outbox_id))
 	{
+		// Legacy
 		return ACCEPT_NO;
 	}
 
@@ -2154,6 +2155,7 @@ EAcceptance LLToolDragAndDrop::dad3dWearCategory(
 		const LLUUID &outbox_id = gInventory.findCategoryUUIDForType(LLFolderType::FT_OUTBOX, false);
 		if(gInventory.isObjectDescendentOf(category->getUUID(), outbox_id))
 		{
+			// Legacy
 			return ACCEPT_NO;
 		}
 
diff --git a/indra/newview/lltoolmgr.cpp b/indra/newview/lltoolmgr.cpp
index f6eb290bc34660297224b132b9b6189440e1e294..3fcf193deca2f4688744f41cd14b7798f43e1b39 100644
--- a/indra/newview/lltoolmgr.cpp
+++ b/indra/newview/lltoolmgr.cpp
@@ -355,7 +355,7 @@ bool LLToolMgr::inBuildMode()
 
 bool LLToolMgr::canAccessMarketplace()
 {
-	return (LLMarketplaceData::instance().getSLMStatus() != MarketplaceStatusCodes::MARKET_PLACE_NOT_MIGRATED_MERCHANT) || gSavedSettings.getBOOL("InventoryOutboxDisplayBoth");
+	return (LLMarketplaceData::instance().getSLMStatus() != MarketplaceStatusCodes::MARKET_PLACE_NOT_MIGRATED_MERCHANT);
 }
 
 void LLToolMgr::toggleMarketplace(const LLSD& sdname)
diff --git a/indra/newview/llviewerinventory.cpp b/indra/newview/llviewerinventory.cpp
index 1ab7ec0156d56b42020e622c245f45ec96978453..2cac187302209a06b94453ec45e2551bbe532a65 100644
--- a/indra/newview/llviewerinventory.cpp
+++ b/indra/newview/llviewerinventory.cpp
@@ -1744,7 +1744,7 @@ void menu_create_inventory_item(LLInventoryPanel* panel, LLFolderBridge *bridge,
 {
 	std::string type_name = userdata.asString();
 	
-	if (("inbox" == type_name) || ("outbox" == type_name) || ("category" == type_name) || ("current" == type_name) || ("outfit" == type_name) || ("my_otfts" == type_name))
+	if (("inbox" == type_name) || ("category" == type_name) || ("current" == type_name) || ("outfit" == type_name) || ("my_otfts" == type_name))
 	{
 		LLFolderType::EType preferred_type = LLFolderType::lookup(type_name);
 
diff --git a/indra/newview/llviewermenu.cpp b/indra/newview/llviewermenu.cpp
index 1566736f171555e1ec5ed8df8ba853156bb9d9ee..8ef37b91439647e7161cc42180058580debed5be 100644
--- a/indra/newview/llviewermenu.cpp
+++ b/indra/newview/llviewermenu.cpp
@@ -401,23 +401,20 @@ void set_merchant_SLM_menu()
 
 void check_merchant_status(bool force)
 {
-    if (!gSavedSettings.getBOOL("InventoryOutboxDisplayBoth"))
+    if (force)
     {
-        if (force)
-        {
-            // Reset the SLM status: we actually want to check again, that's the point of calling check_merchant_status()
-            LLMarketplaceData::instance().setSLMStatus(MarketplaceStatusCodes::MARKET_PLACE_NOT_INITIALIZED);
-        }
-        // Hide SLM related menu item
-        gMenuHolder->getChild<LLView>("MarketplaceListings")->setVisible(FALSE);
-        
-        // Also disable the toolbar button for Marketplace Listings
-        LLCommand* command = LLCommandManager::instance().getCommand("marketplacelistings");
-		gToolBarView->enableCommand(command->id(), false);
-        
-        // Launch an SLM test connection to get the merchant status
-        LLMarketplaceData::instance().initializeSLM(boost::bind(&set_merchant_SLM_menu));
+        // Reset the SLM status: we actually want to check again, that's the point of calling check_merchant_status()
+        LLMarketplaceData::instance().setSLMStatus(MarketplaceStatusCodes::MARKET_PLACE_NOT_INITIALIZED);
     }
+    // Hide SLM related menu item
+    gMenuHolder->getChild<LLView>("MarketplaceListings")->setVisible(FALSE);
+
+    // Also disable the toolbar button for Marketplace Listings
+    LLCommand* command = LLCommandManager::instance().getCommand("marketplacelistings");
+    gToolBarView->enableCommand(command->id(), false);
+
+    // Launch an SLM test connection to get the merchant status
+    LLMarketplaceData::instance().initializeSLM(boost::bind(&set_merchant_SLM_menu));
 }
 
 void init_menus()
diff --git a/indra/newview/skins/default/textures/textures.xml b/indra/newview/skins/default/textures/textures.xml
index d45df0d630bafb2ddb3285382143c1a5ceccd5cb..527df472ac64edb841d9aa1daff984db6c2a4bbd 100644
--- a/indra/newview/skins/default/textures/textures.xml
+++ b/indra/newview/skins/default/textures/textures.xml
@@ -144,7 +144,6 @@ with the same filename but different name
   <texture name="Command_MiniCart_Icon"     file_name="toolbar_icons/mini_cart.png"    preload="true" />
   <texture name="Command_MiniMap_Icon"      file_name="toolbar_icons/mini_map.png"     preload="true" />
   <texture name="Command_Move_Icon"         file_name="toolbar_icons/move.png"         preload="true" />
-  <texture name="Command_Outbox_Icon"       file_name="toolbar_icons/outbox.png"       preload="true" />
   <texture name="Command_People_Icon"       file_name="toolbar_icons/people.png"       preload="true" />
   <texture name="Command_Picks_Icon"        file_name="toolbar_icons/picks.png"        preload="true" />
   <texture name="Command_Places_Icon"       file_name="toolbar_icons/places.png"       preload="true" />
diff --git a/indra/newview/skins/default/xui/en/floater_merchant_outbox.xml b/indra/newview/skins/default/xui/en/floater_merchant_outbox.xml
deleted file mode 100644
index 7802f65902e5f4452ec1a37112ad5ef0a66ce712..0000000000000000000000000000000000000000
--- a/indra/newview/skins/default/xui/en/floater_merchant_outbox.xml
+++ /dev/null
@@ -1,156 +0,0 @@
-<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
-<floater
-    positioning="cascading"
-    can_close="true"
-    can_resize="true"
-    height="440"
-    help_topic="floater_merchant_outbox"
-    min_width="300"
-    min_height="200"
-    name="floater_merchant_outbox"
-    save_rect="true"
-    save_visibility="false"
-    reuse_instance="true"
-    title="MERCHANT OUTBOX"
-    width="333">
-  <string name="OutboxFolderCount0"></string>
-  <string name="OutboxFolderCount1">1 folder</string>
-  <string name="OutboxFolderCountN">[NUM] folders</string>
-  <string name="OutboxImporting">Sending folders...</string>
-  <string name="OutboxInitializing">Initializing...</string>
-  <panel
-      name="panel_1"
-      follows="all"
-      layout="topleft"
-      left="0"
-      top="0"
-      label=""
-      height="440"
-      width="333">
-    <panel
-        name="panel_2"
-        follows="all"
-        left="10"
-        bottom="370"
-        width="313"
-        top="0"
-        bg_opaque_color="InventoryBackgroundColor">
-      <panel
-          name="outbox_inventory_placeholder_panel"
-          follows="all"
-          layout="topleft"
-          top="0"
-          left="0"
-          width="308"
-          height="370"
-          bg_opaque_color="InventoryBackgroundColor">
-        <text
-            name="outbox_inventory_placeholder_title"
-            type="string"
-            follows="top|left|right"
-            layout="topleft"
-            top="10"
-            left="0"
-            width="308"
-            height="25"
-            wrap="true"
-            halign="center"
-            font="SansSerifBold">
-          Loading...
-        </text>
-        <text
-            name="outbox_inventory_placeholder_text"
-            type="string"
-            follows="top|left|right"
-            layout="topleft"
-            top="35"
-            left="0"
-            width="308"
-            height="130"
-            wrap="true"
-            halign="left" />
-      </panel>
-    </panel>
-    <panel
-        name="panel_3"
-        follows="bottom|left|right"
-        left="10"
-        bottom="435"
-        width="313"
-        top="370">
-      <panel
-          name="outbox_generic_drag_target"
-          mouse_opaque="false"
-          follows="all"
-          top="5"
-          left="5"
-          width="303"
-          height="25"
-          background_visible="false"
-          bg_alpha_color="EmphasisColor_35"
-          border="true"
-          bevel_style="in"
-          visible="true">
-        <text
-            name="text_1"
-            type="string"
-            follows="all"
-            layout="topleft"
-            top="6"
-            height="20"
-            left="5"
-            width="293"
-            halign="center"
-            font="SansSerifMedium"
-            font_shadow="hard"
-            valign="top">
-          Drag items here to create folders
-        </text>
-      </panel>
-      <text
-          name="outbox_folder_count"
-          type="string"
-          follows="all"
-          layout="topleft"
-          top="40"
-          left="5"
-          width="150"
-          height="20"
-          wrap="true"
-          halign="left"
-          valign="center"
-          font="SansSerif"/>
-      <button
-          label="Send to Marketplace"
-          tool_tip="Push to my Marketplace Storefront"
-          is_toggle="false"
-          name="outbox_import_btn"
-          follows="bottom|right"
-          tab_stop="false"
-          halign="center"
-          top="37"
-          left="160"
-          height="25"
-          width="150"
-          enabled="false" />
-    </panel>
-    <layout_stack name="import_progress_indicator" orientation="vertical" left="0" height="440" top="0" width="333" follows="all" visible="false">
-      <layout_panel />
-      <layout_panel height="24" auto_resize="false">
-        <layout_stack orientation="horizontal" left="0" height="24" top="0" width="333" follows="all">
-          <layout_panel width="0" />
-          <layout_panel width="24" auto_resize="false">
-            <loading_indicator
-                height="24"
-                layout="topleft"
-                left="0"
-                top="0"
-                width="24" />
-          </layout_panel>
-          <layout_panel width="0" />
-        </layout_stack>
-      </layout_panel>
-      <layout_panel />
-    </layout_stack>
-  </panel>
-</floater>
diff --git a/indra/newview/skins/default/xui/en/floater_preview_trash.xml b/indra/newview/skins/default/xui/en/floater_preview_trash.xml
index 9e50e89ac953b556d4c18aaca44e52247be10dea..3fa71e7bfe024c7f44358481d1c42f48ba48d405 100644
--- a/indra/newview/skins/default/xui/en/floater_preview_trash.xml
+++ b/indra/newview/skins/default/xui/en/floater_preview_trash.xml
@@ -14,7 +14,7 @@
  reuse_instance="true"
  can_minimize="false">
   <inventory_panel
-      name="inventory_outbox"
+      name="inventory_trash"
       start_folder.name="Trash"
       show_empty_message="false"
       start_folder.type="trash"
diff --git a/indra/newview/skins/default/xui/en/panel_outbox_inventory.xml b/indra/newview/skins/default/xui/en/panel_outbox_inventory.xml
deleted file mode 100644
index b2d8bb874b642b845130c0d444aab27ee63f1589..0000000000000000000000000000000000000000
--- a/indra/newview/skins/default/xui/en/panel_outbox_inventory.xml
+++ /dev/null
@@ -1,31 +0,0 @@
-<?xml version="1.0" encoding="utf-8" standalone="yes" ?>
-<inventory_panel
-    name="inventory_outbox"
-    start_folder.name="Outbox"
-    show_empty_message="false"
-    start_folder.type="outbox"
-    follows="all" layout="topleft"
-    top="0" left="0" height="165" width="308"
-    top_pad="0"
-    bg_opaque_color="DkGray2"
-    bg_alpha_color="DkGray2"
-    background_visible="true"
-    border="false"
-    bevel_style="none"
-    show_item_link_overlays="true"
-    tool_tip="Drag and drop items here to prepare them for sale on your storefront"
-    scroll.reserve_scroll_corner="false">
-      <folder folder_arrow_image="Folder_Arrow"
-              folder_indentation="8"
-              item_height="20"
-              item_top_pad="4"
-              selection_image="Rounded_Square"
-              left_pad="5"
-              icon_pad="2"
-              icon_width="16"
-              text_pad="1"
-              text_pad_right="4"
-              arrow_size="12"
-              max_folder_item_overlap="2"/>
-      <item allow_wear="false"/>
-</inventory_panel>
diff --git a/indra/newview/skins/default/xui/en/strings.xml b/indra/newview/skins/default/xui/en/strings.xml
index fbcadfdebf18e5f3551e213b6458a8658ea3aa2c..585cc6e56a08ad1ab15bc5dfa8a101d3c11cf9da 100644
--- a/indra/newview/skins/default/xui/en/strings.xml
+++ b/indra/newview/skins/default/xui/en/strings.xml
@@ -4094,7 +4094,6 @@ Try enclosing path to the editor with double quotes.
   <string name="Command_MarketplaceListings_Label">Marketplace</string>
   <string name="Command_MiniMap_Label">Mini-map</string>
   <string name="Command_Move_Label">Walk / run / fly</string>
-  <string name="Command_Outbox_Label">Merchant outbox</string>
   <string name="Command_People_Label">People</string>
   <string name="Command_Picks_Label">Picks</string>
   <string name="Command_Places_Label">Places</string>
@@ -4126,7 +4125,6 @@ Try enclosing path to the editor with double quotes.
   <string name="Command_MarketplaceListings_Tooltip">Sell your creation</string>
   <string name="Command_MiniMap_Tooltip">Show nearby people</string>
   <string name="Command_Move_Tooltip">Moving your avatar</string>
-  <string name="Command_Outbox_Tooltip">Transfer items to your marketplace for sale</string>
   <string name="Command_People_Tooltip">Friends, groups, and nearby people</string>
   <string name="Command_Picks_Tooltip">Places to show as favorites in your profile</string>
   <string name="Command_Places_Tooltip">Places you've saved</string>