diff --git a/NEWS b/NEWS
index 09deea7ed..5288e6534 100644
--- a/NEWS
+++ b/NEWS
@@ -5,6 +5,7 @@ Enhancements
  - [web] expose all email addresses in autocompletion of message editor (#3443)
  - [web] Gravatar service can now be disabled (#3600)
  - [web] collapsable mail accounts (#3493)
+ - [web] show progress indicator when loading messages and cards
 
 Bug fixes
  - [web] fixed creation of chip on blur (sgTransformOnBlur directive)
diff --git a/UI/Templates/ContactsUI/UIxContactFoldersView.wox b/UI/Templates/ContactsUI/UIxContactFoldersView.wox
index ab4337098..80b5f510c 100644
--- a/UI/Templates/ContactsUI/UIxContactFoldersView.wox
+++ b/UI/Templates/ContactsUI/UIxContactFoldersView.wox
@@ -411,17 +411,22 @@
                     <!-- selected avatar -->
                   <!-- </div> -->
                   <sg-avatar-image class="md-avatar"
-                                   ng-if="addressbook.notSelectedComponent(currentCard, 'vcard')"
+                                   ng-if="currentCard.$isCard()"
                                    sg-email="currentCard.$preferredEmail(addressbook.selectedFolder.constructor.$query.value)"
                                    sg-src="currentCard.photoURL"
                                    size="40">
                     <!-- contact avatar -->
                   </sg-avatar-image>
                   <div class="md-avatar sg-avatar-list"
-                       ng-show="addressbook.notSelectedComponent(currentCard, 'vlist')">
+                       ng-show="currentCard.$isList()">
                     <!-- list avatar -->
                   </div>
                 </div>
+                <div class="sg-progress-linear-bottom">
+                  <md-progress-linear class="md-accent"
+                                      md-mode="indeterminate"
+                                      ng-show="currentCard.$isLoading()"><!-- progress --></md-progress-linear>
+                </div>
               </md-list-item>
             </md-list>
           </md-virtual-repeat-container>
diff --git a/UI/Templates/MailerUI/UIxMailFolderTemplate.wox b/UI/Templates/MailerUI/UIxMailFolderTemplate.wox
index 59ad127d1..8657aa4f2 100644
--- a/UI/Templates/MailerUI/UIxMailFolderTemplate.wox
+++ b/UI/Templates/MailerUI/UIxMailFolderTemplate.wox
@@ -302,6 +302,11 @@
               <md-icon class="ng-hide" ng-show="currentMessage.isforwarded">forward</md-icon>
               <md-icon class="ng-hide" ng-show="currentMessage.hasattachment">attach_file</md-icon>
             </div>
+            <div class="sg-progress-linear-bottom">
+              <md-progress-linear class="md-accent"
+                                  md-mode="indeterminate"
+                                  ng-show="currentMessage.$isLoading()"><!-- message loading progress --></md-progress-linear>
+            </div>
           </md-list-item>
         </md-list>
       </md-virtual-repeat-container>
@@ -309,7 +314,7 @@
            ng-show="mailbox.service.selectedFolder.$isLoading">
         <md-progress-circular class="md-accent"
                               md-mode="indeterminate"
-                              md-diameter="32"><!-- progress --></md-progress-circular>
+                              md-diameter="32"><!-- mailbox loading progress --></md-progress-circular>
       </div>
       <md-button class="md-fab md-fab-bottom-right md-accent"
                  label:aria-label="Write a new message"
diff --git a/UI/WebServerResources/js/Contacts/AddressBook.service.js b/UI/WebServerResources/js/Contacts/AddressBook.service.js
index ee49bf9eb..8483a05c5 100644
--- a/UI/WebServerResources/js/Contacts/AddressBook.service.js
+++ b/UI/WebServerResources/js/Contacts/AddressBook.service.js
@@ -483,7 +483,7 @@
             // Add new cards matching the search query
             _.forEach(results, function(cardId, index) {
               if (_.isUndefined(_.find(cards, _.bind(compareIds, cardId)))) {
-                var data = { id: cardId };
+                var data = { pid: addressbookId, id: cardId };
                 var card = new AddressBook.$Card(data, search);
                 cards.splice(index, 0, card);
               }
@@ -686,7 +686,7 @@
 
           // Instanciate Card objects
           _.reduce(_this.ids, function(cards, card, i) {
-            var data = { id: card };
+            var data = { pid: _this.id, id: card };
 
             // Build map of ID <=> index
             _this.idsMap[data.id] = i;
diff --git a/UI/WebServerResources/js/Contacts/AddressBookController.js b/UI/WebServerResources/js/Contacts/AddressBookController.js
index f67110421..cca2da3e9 100644
--- a/UI/WebServerResources/js/Contacts/AddressBookController.js
+++ b/UI/WebServerResources/js/Contacts/AddressBookController.js
@@ -17,7 +17,6 @@
     vm.selectCard = selectCard;
     vm.toggleCardSelection = toggleCardSelection;
     vm.newComponent = newComponent;
-    vm.notSelectedComponent = notSelectedComponent;
     vm.unselectCards = unselectCards;
     vm.confirmDeleteSelectedCards = confirmDeleteSelectedCards;
     vm.copySelectedCards = copySelectedCards;
@@ -79,10 +78,6 @@
       }
     }
 
-    function notSelectedComponent(currentCard, type) {
-      return (currentCard && currentCard.c_component == type && !currentCard.selected);
-    }
-
     function unselectCards() {
       _.forEach(vm.selectedFolder.$cards, function(card) {
         card.selected = false;
@@ -180,12 +175,10 @@
             });
           }
           else {
-            promises.push(vm.selectedFolder.$getCard(card.id).then(function(card) {
-              return card.$futureCardData.then(function(data) {
-                _.forEach(data.refs, function(ref) {
-                  if (ref.email.length)
-                    recipients.push(ref.$shortFormat());
-                });
+            promises.push(card.$reload().then(function(card) {
+              _.forEach(card.refs, function(ref) {
+                if (ref.email.length)
+                  recipients.push(ref.$shortFormat());
               });
             }));
           }
diff --git a/UI/WebServerResources/js/Contacts/Card.service.js b/UI/WebServerResources/js/Contacts/Card.service.js
index 98264fa5b..4c2925a68 100644
--- a/UI/WebServerResources/js/Contacts/Card.service.js
+++ b/UI/WebServerResources/js/Contacts/Card.service.js
@@ -70,9 +70,11 @@
   }
   angular.module('SOGo.ContactsUI')
     .constant('sgCard_STATUS', {
-      NOT_LOADED: 0,
-      LOADING: 1,
-      LOADED: 2
+      NOT_LOADED:      0,
+      DELAYED_LOADING: 1,
+      LOADING:         2,
+      LOADED:          3,
+      DELAYED_MS:      300
     })
     .factory('Card', Card.$factory);
 
@@ -164,6 +166,33 @@
     });
   };
 
+  /**
+   * @function $isLoading
+   * @memberof Card.prototype
+   * @returns true if the Card definition is still being retrieved from server after a specific delay
+   * @see sgCard_STATUS
+   */
+  Card.prototype.$isLoading = function() {
+    return this.$loaded == Card.STATUS.LOADING;
+  };
+
+  /**
+   * @function $reload
+   * @memberof Message.prototype
+   * @desc Fetch the viewable message body along with other metadata such as the list of attachments.
+   * @returns a promise of the HTTP operation
+   */
+  Card.prototype.$reload = function() {
+    var futureCardData;
+
+    if (this.$futureCardData)
+      return this;
+
+    futureCardData = Card.$$resource.fetch([this.pid, this.id].join('/'), 'view');
+
+    return this.$unwrap(futureCardData);
+  };
+
   /**
    * @function $save
    * @memberof Card.prototype
@@ -498,7 +527,11 @@
     var _this = this;
 
     // Card is not loaded yet
-    this.$loaded = Card.STATUS.LOADING;
+    this.$loaded = Card.STATUS.DELAYED_LOADING;
+    Card.$timeout(function() {
+      if (_this.$loaded != Card.STATUS.LOADED)
+        _this.$loaded = Card.STATUS.LOADING;
+    }, Card.STATUS.DELAYED_MS);
 
     // Expose the promise
     this.$futureCardData = futureCardData.then(function(data) {
@@ -523,6 +556,8 @@
 
       return _this;
     });
+
+    return this.$futureCardData;
   };
 
   /**
diff --git a/UI/WebServerResources/js/Contacts/Contacts.app.js b/UI/WebServerResources/js/Contacts/Contacts.app.js
index f6bd3e15d..d10d1abe1 100644
--- a/UI/WebServerResources/js/Contacts/Contacts.app.js
+++ b/UI/WebServerResources/js/Contacts/Contacts.app.js
@@ -64,7 +64,9 @@
         },
         resolve: {
           stateCard: stateCard
-        }
+        },
+        onEnter: onEnterCard,
+        onExit: onExitCard
       })
       .state('app.addressbook.card.view', {
         url: '/view',
@@ -129,10 +131,37 @@
   /**
    * @ngInject
    */
-  stateCard.$inject = ['$stateParams', 'stateAddressbook'];
-  function stateCard($stateParams, stateAddressbook) {
+  stateCard.$inject = ['$state', '$stateParams', 'stateAddressbook'];
+  function stateCard($state, $stateParams, stateAddressbook) {
+    var card;
+
+    card = _.find(stateAddressbook.$cards, function(cardObject) {
+      return (cardObject.id == $stateParams.cardId);
+    });
+
+    if (card) {
+      return card.$reload();
+    }
+    else {
+      // Card not found
+      $state.go('app.addressbook');
+    }
+  }
+
+  /**
+   * @ngInject
+   */
+  onEnterCard.$inject = ['$stateParams', 'stateAddressbook'];
+  function onEnterCard($stateParams, stateAddressbook) {
     stateAddressbook.selectedCard = $stateParams.cardId;
-    return stateAddressbook.$getCard($stateParams.cardId);
+  }
+
+  /**
+   * @ngInject
+   */
+  onExitCard.$inject = ['stateAddressbook'];
+  function onExitCard(stateMailbox) {
+    delete stateAddressbook.selectedCard;
   }
 
   /**
diff --git a/UI/WebServerResources/js/Mailer/Mailbox.service.js b/UI/WebServerResources/js/Mailer/Mailbox.service.js
index 64eef92a3..b5224eec2 100644
--- a/UI/WebServerResources/js/Mailer/Mailbox.service.js
+++ b/UI/WebServerResources/js/Mailer/Mailbox.service.js
@@ -600,7 +600,7 @@
    * @return the index of the first deleted message
    */
   Mailbox.prototype.$_deleteMessages = function(uids, messages) {
-    var _this = this, selectedMessages, selectedUIDs, unseen, firstIndex = this.$messages.length;
+    var _this = this, selectedUIDs, _$messages, unseen, firstIndex = this.$messages.length;
 
     // Decrement the unseen count
     unseen = _.filter(messages, function(message, i) { return !message.isread; });
diff --git a/UI/WebServerResources/js/Mailer/Mailer.app.js b/UI/WebServerResources/js/Mailer/Mailer.app.js
index cdb279d38..200caff7d 100644
--- a/UI/WebServerResources/js/Mailer/Mailer.app.js
+++ b/UI/WebServerResources/js/Mailer/Mailer.app.js
@@ -61,13 +61,13 @@
             controllerAs: 'viewer'
           }
         },
-        onEnter: onEnterMessage,
-        onExit: onExitMessage,
         resolve: {
           stateMailbox: stateVirtualMailboxOfMessage,
           stateMessages: stateMessages,
           stateMessage: stateMessage
-        }
+        },
+        onEnter: onEnterMessage,
+        onExit: onExitMessage
       })
       .state('mail.account.inbox', {
         url: '/inbox',
@@ -279,7 +279,7 @@
     });
 
     if (message) {
-      return message.$reload();
+      return message.$reload({useCache: true});
     }
     else {
       // Message not found
diff --git a/UI/WebServerResources/js/Mailer/Message.service.js b/UI/WebServerResources/js/Mailer/Message.service.js
index 1eb0cf9f5..2b578e48f 100644
--- a/UI/WebServerResources/js/Mailer/Message.service.js
+++ b/UI/WebServerResources/js/Mailer/Message.service.js
@@ -39,8 +39,9 @@
    * @desc The factory we'll use to register with Angular
    * @returns the Message constructor
    */
-  Message.$factory = ['$q', '$timeout', '$log', 'sgSettings', 'Gravatar', 'Resource', 'Preferences', function($q, $timeout, $log, Settings, Gravatar, Resource, Preferences) {
+  Message.$factory = ['$q', '$timeout', '$log', 'sgSettings', 'sgMessage_STATUS', 'Gravatar', 'Resource', 'Preferences', function($q, $timeout, $log, Settings, Message_STATUS, Gravatar, Resource, Preferences) {
     angular.extend(Message, {
+      STATUS: Message_STATUS,
       $q: $q,
       $timeout: $timeout,
       $log: $log,
@@ -72,6 +73,13 @@
     angular.module('SOGo.MailerUI', ['SOGo.Common']);
   }
   angular.module('SOGo.MailerUI')
+    .constant('sgMessage_STATUS', {
+      NOT_LOADED:      0,
+      DELAYED_LOADING: 1,
+      LOADING:         2,
+      LOADED:          3,
+      DELAYED_MS:      300
+    })
     .factory('Message', Message.$factory);
 
   /**
@@ -503,15 +511,29 @@
     });
   };
 
+  /**
+   * @function $isLoading
+   * @memberof Message.prototype
+   * @returns true if the Message content is still being retrieved from server after a specific delay
+   * @see sgMessage_STATUS
+   */
+  Message.prototype.$isLoading = function() {
+    return this.$loaded == Message.STATUS.LOADING;
+  };
+
   /**
    * @function $reload
    * @memberof Message.prototype
    * @desc Fetch the viewable message body along with other metadata such as the list of attachments.
+   * @param {object} [options] - set {useCache: true} to use already fetched data
    * @returns a promise of the HTTP operation
    */
   Message.prototype.$reload = function(options) {
     var futureMessageData;
 
+    if (options && options.useCache && this.$futureMessageData)
+      return this;
+
     futureMessageData = Message.$$resource.fetch(this.$absolutePath(options), 'view');
 
     return this.$unwrap(futureMessageData);
@@ -638,6 +660,13 @@
   Message.prototype.$unwrap = function(futureMessageData) {
     var _this = this;
 
+    // Message is not loaded yet
+    this.$loaded = Message.STATUS.DELAYED_LOADING;
+    Message.$timeout(function() {
+      if (_this.$loaded != Message.STATUS.LOADED)
+        _this.$loaded = Message.STATUS.LOADING;
+    }, Message.STATUS.DELAYED_MS);
+
     // Resolve and expose the promise
     this.$futureMessageData = futureMessageData.then(function(data) {
       // Calling $timeout will force Angular to refresh the view
@@ -653,6 +682,7 @@
         angular.extend(_this, data);
         _this.$formatFullAddresses();
         _this.$loadUnsafeContent = false;
+        _this.$loaded = Message.STATUS.LOADED;
         return _this;
       });
     });
diff --git a/UI/WebServerResources/scss/components/progressLinear/progress-linear.scss b/UI/WebServerResources/scss/components/progressLinear/progress-linear.scss
index ae84c9a0e..b17295053 100644
--- a/UI/WebServerResources/scss/components/progressLinear/progress-linear.scss
+++ b/UI/WebServerResources/scss/components/progressLinear/progress-linear.scss
@@ -1,2 +1,9 @@
 /// progressLinear.scss -*- Mode: scss; indent-tabs-mode: nil; basic-offset: 2 -*-
 @import 'extends';
+
+.sg-progress-linear-bottom {
+  bottom: 0;
+  left: 0;
+  position: absolute;
+  right: 0;
+}
\ No newline at end of file