diff --git a/main/cron/forum_bulk_notification_to_course_teacher_for_new_post_in_last_X_days.php b/main/cron/forum_bulk_notification_to_course_teacher_for_new_post_in_last_X_days.php
new file mode 100644
index 0000000000..459c06de52
--- /dev/null
+++ b/main/cron/forum_bulk_notification_to_course_teacher_for_new_post_in_last_X_days.php
@@ -0,0 +1,145 @@
+<?php
+/* For licensing terms, see /license.txt */
+
+/**
+ * Script to send notification to course's teachers when there are activities in a thread of a forum in his courses in the last X days
+ * The number of days is defined at the begining of the script with the variable
+ * It will send one sigle mail per user to notify with a line for each thread including thread's title, thread link and number of new post.
+ * 
+ * @package chamilo.cron
+ */
+
+//This variable define the number of days in the past to look for activies in the forums
+//This variable should be the same as the periodicity of the cron (if the cron is every day, then the variable should be equal to 1)
+$numberOfDaysForLastActivy = 1;
+require_once __DIR__.'/../inc/global.inc.php';
+
+/**
+ * Initialization.
+ */
+if ('cli' != php_sapi_name()) {
+    exit; //do not run from browser
+}
+
+$date = new DateTime('now', new DateTimeZone('UTC'));
+$date->modify("-$numberOfDaysForLastActivy day");
+$startDate = $date->format('Y-m-d H:i:s');
+
+$tablePost = Database::get_course_table(TABLE_FORUM_POST);
+$tableThread = Database::get_course_table(TABLE_FORUM_THREAD);
+$UpdatedThreads = [];
+$sql = "SELECT * FROM $tableThread WHERE thread_date > '".$startDate."'";
+$result = Database::query($sql);
+while ($row = Database::fetch_array($result)) {
+        $courseInfo = api_get_course_info_by_id($row['c_id']);
+        $updatedThreads[$row['c_id']]['courseName'] = $courseInfo['name'];
+        $sqlNbPost = "SELECT count(*) as nbPost FROM $tablePost WHERE thread_id = '".$row['iid']."' and post_date > '".$startDate."'";
+        $resultNbPost = Database::query($sqlNbPost);
+        $rowNbPost = Database::fetch_array($resultNbPost);
+        $updatedThreads[$row['c_id']][$row['session_id']][$row['iid']] = [
+            'threadTitle' => $row['thread_title'],
+            'threadNbPost' => $rowNbPost['nbPost'],
+            'threadLink' => api_get_path(WEB_PATH) . 'main/forum/viewthread.php?cidReq=' . $courseInfo['code'] . '&id_session=' . $row['session_id'] . '&gidReq=0&gradebook=0&origin=&forum=' . $row['forum_id'] . '&thread=' . $row['iid']
+        ];
+
+}
+foreach ($updatedThreads as $courseId => $sessions) {
+    foreach ($sessions as $sessionId => $threads) {
+        if ($sessionId === 0) {
+            $teacherList = CourseManager::getTeachersFromCourse($courseId, false);
+            foreach ($teacherList as $teacher) {
+                $usersToNotify[$teacher['id']][$courseId]['courseName'] = $sessions['courseName'];
+                $usersToNotify[$teacher['id']][$courseId][$sessionId] = $threads;
+            }
+        } else {
+            $courseCoachs = CourseManager::get_coachs_from_course(
+                $sessionId,
+                $courseId,
+                false
+            );
+            foreach ($courseCoachs as $coach) {
+                $usersToNotify[$coach['user_id']][$courseId]['courseName'] = $sessions['courseName'];
+                $usersToNotify[$coach['user_id']][$courseId][$sessionId] = $threads;
+            }
+        }
+    }
+}
+foreach ($usersToNotify as $userId => $notifyInfo) {
+    sendMessage ($userId, $notifyInfo);
+}
+
+
+
+/**
+ * Send the message to notify the specific user for all its courses and threads that have been updated, 
+ * manage the corresponding template and send through MessageManager::send_message_simple.
+ *
+ * @param $toUserId
+ * @param $notifyInfo
+ *
+ * @return bool|int
+ */
+function sendMessage(
+    $toUserId,
+    $notifyInfo
+) {
+
+    $userInfo = api_get_user_info($toUserId);
+    $language = $userInfo['language'];
+    $subject = getUserLang('ForumBulkNotificationMailSubject', $language);
+
+    $bodyTemplate = new Template(
+        null,
+        false,
+        false,
+        false,
+        false,
+        false
+    );
+
+    $userFullName = api_get_person_name($userInfo['firstname'], $userInfo['lastname']);
+    $bodyTemplate->assign('HelloX', sprintf(getUserLang('HelloX', $language), $userFullName));
+    $bodyTemplate->assign('NotificationInYouForums', sprintf(getUserLang('NotificationInYouForums', $language)));
+    $bodyTemplate->assign('SignatureFormula', sprintf(getUserLang('SignatureFormula', $language)));
+    $bodyTemplate->assign('notifyInfo', $notifyInfo);
+
+    $bodyLayout = $bodyTemplate->get_template(
+        'mail/cron_forum_update_bulk_notification_body.tpl'
+    );
+
+    $content = $bodyTemplate->fetch($bodyLayout);
+
+    return MessageManager::send_message_simple(
+        $toUserId,
+        $subject,
+        $content,
+        1,
+    );
+}
+
+/**
+ * Returns a translated (localized) string by user language.
+ *
+ * @param $variable
+ * @param $language
+ *
+ * @return mixed
+ */
+function getUserLang($variable, $language)
+{
+    $languageFilesToLoad = api_get_language_files_to_load($language);
+    foreach ($languageFilesToLoad as $languageFile) {
+        include $languageFile;
+    }
+
+    $translate = $variable;
+    if (isset($$variable)) {
+        $langVariable = $$variable;
+        $translate = $langVariable;
+    }
+
+    return $translate;
+}
+
+exit();
+
diff --git a/main/lang/english/trad4all.inc.php b/main/lang/english/trad4all.inc.php
index a6935994b2..cc59b9ad32 100644
--- a/main/lang/english/trad4all.inc.php
+++ b/main/lang/english/trad4all.inc.php
@@ -9034,4 +9034,5 @@ $ShowCareersHierarchy = "Show hierarchies";
 $ParentCareer = "Parent career";
 $CareerCannotBeDeletedAsItHasChildren = "This career cannot be deleted until all of its children have been deleted or moved to another career.";
 $EmailUsedTwiceInImportFile = "This email is already in use by another user in the same file.";
+$NotificationInYourForums = "You have new posts in the following forums of your courses.";
 ?>
\ No newline at end of file
diff --git a/main/lang/french/trad4all.inc.php b/main/lang/french/trad4all.inc.php
index d5314e8c82..5ecdc850e9 100644
--- a/main/lang/french/trad4all.inc.php
+++ b/main/lang/french/trad4all.inc.php
@@ -8968,4 +8968,5 @@ $ShowCareersHierarchy = "Montrer les hiérarchies";
 $ParentCareer = "Filière parente";
 $CareerCannotBeDeletedAsItHasChildren = "Cette filière ne peut pas être supprimée tant que tous ses enfants n'ont pas été supprimés ou déplacés vers une autre filière.";
 $EmailUsedTwiceInImportFile = "Ce courriel est déjà utilisé par un autre utilisateur du même fichier.";
+$NotificationInYourForums = "Vous avez de nouveaux posts dans les forums suivants de vos cours.";
 ?>
\ No newline at end of file
diff --git a/main/lang/spanish/trad4all.inc.php b/main/lang/spanish/trad4all.inc.php
index 2b16bec83b..7490606161 100644
--- a/main/lang/spanish/trad4all.inc.php
+++ b/main/lang/spanish/trad4all.inc.php
@@ -9059,4 +9059,5 @@ $ShowCareersHierarchy = "Mostrar jerarquías";
 $ParentCareer = "Carrera padre";
 $CareerCannotBeDeletedAsItHasChildren = "Esta carrera no puede ser eliminada hasta que las carreras hijas a ésta sean eliminadas o movidas a otra carrera.";
 $EmailUsedTwiceInImportFile = "Este correo electrónico ya está usado por otro usuario en el mismo archivo.";
+$NotificationInYourForums = "Hay nuevos posts en los foros siguientes de tus cursos.";
 ?>
\ No newline at end of file
diff --git a/main/template/default/mail/cron_forum_update_bulk_notification_body.tpl b/main/template/default/mail/cron_forum_update_bulk_notification_body.tpl
new file mode 100644
index 0000000000..7cd522b259
--- /dev/null
+++ b/main/template/default/mail/cron_forum_update_bulk_notification_body.tpl
@@ -0,0 +1,22 @@
+<p>
+    {{HelloX}}
+</p>
+
+<p>
+    {{NotificationInYourForums}}
+</p>
+
+{% for course in notifyInfo %}
+    <h3>{{ course.courseName }}</h3>
+    <ul>
+    {% for session in course %}
+        {% for thread in session %}
+            <li><a href="{{ thread.threadLink }}">
+                    <em class="fa fa-chevron-circle-right"></em>{{ thread.threadTitle }}
+                </a> : {{ thread.threadNbPost }} {{ NewForumPost }}
+            </li>
+        {% endfor %}
+    {% endfor %}
+    </ul>
+{% endfor %}
+<p>{{SignatureFormula}}</p>