diff --git a/app/assets/javascripts/admin/models/admin_user.js b/app/assets/javascripts/admin/models/admin_user.js
index 493ec58d19f..4f186829a05 100644
--- a/app/assets/javascripts/admin/models/admin_user.js
+++ b/app/assets/javascripts/admin/models/admin_user.js
@@ -38,7 +38,11 @@ Discourse.AdminUser = Discourse.User.extend({
 
   deleteAllPostsExplanation: function() {
     if (!this.get('can_delete_all_posts')) {
-      return I18n.t('admin.user.cant_delete_all_posts', {count: Discourse.SiteSettings.delete_user_max_post_age});
+      if (this.get('post_count') > Discourse.SiteSettings.delete_all_posts_max) {
+        return I18n.t('admin.user.cant_delete_all_too_many_posts', {count: Discourse.SiteSettings.delete_all_posts_max});
+      } else {
+        return I18n.t('admin.user.cant_delete_all_posts', {count: Discourse.SiteSettings.delete_user_max_post_age});
+      }
     } else {
       return null;
     }
diff --git a/config/locales/client.en.yml b/config/locales/client.en.yml
index 044d2b17472..0820df06c56 100644
--- a/config/locales/client.en.yml
+++ b/config/locales/client.en.yml
@@ -1631,8 +1631,11 @@ en:
           one: "Users can't be deleted if they have posts. Delete all posts before trying to delete a user. (Posts older than %{count} day old can't be deleted.)"
           other: "Users can't be deleted if they have posts. Delete all posts before trying to delete a user. (Posts older than %{count} days old can't be deleted.)"
         cant_delete_all_posts:
-          one: "Can't delete all posts. Some posts are older than %{count} day old."
-          other: "Can't delete all posts. Some posts are older than %{count} days old."
+          one: "Can't delete all posts. Some posts are older than %{count} day old. (The delete_user_max_post_age setting.)"
+          other: "Can't delete all posts. Some posts are older than %{count} days old. (The delete_user_max_post_age setting.)"
+        cant_delete_all_too_many_posts:
+          one: "Can't delete all posts because the user has more than 1 post. (The delete_all_posts_max setting.)"
+          other: "Can't delete all posts because the user has more than %{count} posts.  (The delete_all_posts_max setting.)"
         delete_confirm: "Are you SURE you want to delete this user? This action is permanent!"
         delete_and_block: "<b>Yes</b>, and <b>block</b> future signups from this email and IP address"
         delete_dont_block: "<b>Yes</b>, just delete the user"
diff --git a/config/site_settings.yml b/config/site_settings.yml
index d4a2d0e6f03..49c024f53d9 100644
--- a/config/site_settings.yml
+++ b/config/site_settings.yml
@@ -155,7 +155,9 @@ users:
   delete_user_max_post_age:
     client: true
     default: 60
-  delete_all_posts_max: 15
+  delete_all_posts_max:
+    client: true
+    default: 15
   redirect_users_to_top_page: true
 
 posting: