diff --git a/app/controllers/mailings_controller.rb b/app/controllers/mailings_controller.rb
index 45fe9e4..15b92d9 100644
--- a/app/controllers/mailings_controller.rb
+++ b/app/controllers/mailings_controller.rb
@@ -1,6 +1,6 @@
 class MailingsController < ApplicationController
   before_action :require_current_project!
-  before_action :set_mailing, only: %i[show edit update destroy queue test_send test_preview refresh_recipients update_recipients preview]
+  before_action :set_mailing, only: %i[show edit update destroy queue cancel test_send test_preview refresh_recipients update_recipients preview]
   before_action :load_form_collections, only: %i[new create edit update]
 
   def index
@@ -139,6 +139,20 @@ class MailingsController < ApplicationController
     redirect_to @mailing, alert: e.message
   end
 
+  def cancel
+    unless @mailing.sending?
+      redirect_to @mailing, alert: "Solo un invio in corso può essere fermato."
+      return
+    end
+
+    pending = @mailing.pending_count + @mailing.queued_count
+    @mailing.cancel_send!
+    redirect_to dashboard_mailings_path,
+                notice: "Invio fermato. #{@mailing.sent_count} già inviate, #{pending} annullate in coda."
+  rescue StandardError => e
+    redirect_to @mailing, alert: e.message
+  end
+
   def test_send
     assign_test_preview
     to = @test_to.to_s.strip
diff --git a/app/models/mailing.rb b/app/models/mailing.rb
index 3011f92..18ff949 100644
--- a/app/models/mailing.rb
+++ b/app/models/mailing.rb
@@ -72,6 +72,10 @@ class Mailing < ApplicationRecord
     status == "sent"
   end
 
+  def cancelled?
+    status == "cancelled"
+  end
+
   def editable?
     draft?
   end
@@ -187,6 +191,17 @@ class Mailing < ApplicationRecord
     update!(status: "sent", completed_at: Time.current, next_send_at: nil)
   end
 
+  def cancel_send!
+    raise "Solo un invio in corso può essere fermato" unless sending?
+
+    transaction do
+      mailing_recipients.where(status: %w[pending queued]).find_each do |recipient|
+        recipient.update!(status: "skipped", skip_reason: "invio annullato")
+      end
+      update!(status: "cancelled", next_send_at: nil, completed_at: Time.current)
+    end
+  end
+
   private
 
   def send_window_order
diff --git a/app/models/mailing_recipient.rb b/app/models/mailing_recipient.rb
index 930bfb3..eae4933 100644
--- a/app/models/mailing_recipient.rb
+++ b/app/models/mailing_recipient.rb
@@ -47,10 +47,13 @@ class MailingRecipient < ApplicationRecord
   def deliver!
     with_lock do
       return if status.in?(%w[sent skipped])
+      return abort_delivery!("invio annullato") unless mailing.sending?
 
       update!(status: "queued")
     end
 
+    return unless mailing.sending?
+
     html = rendered_html
     subject_line = rendered_subject_line
     CampaignMailer.outreach(self, html: html, subject: subject_line).deliver_now
@@ -63,6 +66,10 @@ class MailingRecipient < ApplicationRecord
 
   private
 
+  def abort_delivery!(reason)
+    update!(status: "skipped", skip_reason: reason)
+  end
+
   def record_success!(subject_line)
     transaction do
       update!(status: "sent", sent_at: Time.current, rendered_subject: subject_line, error_message: nil)
diff --git a/app/views/mailings/_progress_card.html.erb b/app/views/mailings/_progress_card.html.erb
index 113e11d..9d6f212 100644
--- a/app/views/mailings/_progress_card.html.erb
+++ b/app/views/mailings/_progress_card.html.erb
@@ -30,4 +30,11 @@
   <% elsif mailing.pending_count.positive? %>
     <p class="mt-3 text-xs text-zinc-500">Prossima email in lavorazione.</p>
   <% end %>
+  <% if mailing.sending? %>
+    <div class="mt-4 border-t border-zinc-100 pt-4 dark:border-zinc-800">
+      <%= button_to "Ferma invio", cancel_mailing_path(mailing), method: :post,
+            class: btn_danger,
+            form: { data: { turbo_confirm: "Fermare l'invio? Restano inviate #{mailing.sent_count} email, #{mailing.pending_count + mailing.queued_count} in coda verranno annullate." } } %>
+    </div>
+  <% end %>
 </div>
diff --git a/app/views/mailings/show.html.erb b/app/views/mailings/show.html.erb
index e8ef0f7..a1ffeff 100644
--- a/app/views/mailings/show.html.erb
+++ b/app/views/mailings/show.html.erb
@@ -30,6 +30,10 @@
       <% if @mailing.editable? %>
         <%= link_to "Modifica contenuto", edit_mailing_path(@mailing), class: btn_secondary %>
         <%= button_to "Aggiorna lista", refresh_recipients_mailing_path(@mailing), method: :post, class: btn_secondary %>
+      <% elsif @mailing.sending? %>
+        <%= button_to "Ferma invio", cancel_mailing_path(@mailing), method: :post,
+              class: btn_danger,
+              form: { data: { turbo_confirm: "Fermare l'invio? Le #{@mailing.sent_count} già inviate restano, #{@mailing.pending_count + @mailing.queued_count} in coda verranno annullate." } } %>
       <% end %>
     </div>
   </div>
diff --git a/config/routes.rb b/config/routes.rb
index e3c4365..d03f4e2 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -55,6 +55,7 @@ Rails.application.routes.draw do
       end
       member do
         post :queue
+        post :cancel
         post :test_send
         get :test_preview
         post :refresh_recipients
diff --git a/test/controllers/mailings_controller_test.rb b/test/controllers/mailings_controller_test.rb
index 8488f95..1e6a59c 100644
--- a/test/controllers/mailings_controller_test.rb
+++ b/test/controllers/mailings_controller_test.rb
@@ -184,4 +184,25 @@ class MailingsControllerTest < ActionDispatch::IntegrationTest
     assert_equal "B {{societa}}", mailing.subject_b
     assert_includes mailing.body_html_b, "Versione B dal template"
   end
+
+  test "cancel stops pending recipients and keeps sent ones" do
+    login_as users(:admin)
+    follow_redirect! if response.redirect?
+    create_campaign_org(name: "Seconda societa", email: "seconda@example.com")
+    mailing = create_mailing(identity: @identity, audience: "to_send")
+    mailing.rebuild_recipients!
+    recipients = mailing.mailing_recipients.order(:id).to_a
+    assert recipients.size >= 2
+    recipients.first.update!(status: "sent", sent_at: Time.current)
+    mailing.update!(status: "sending", queued_at: Time.current, test_sent_at: Time.current, test_sent_to: "test@example.com")
+
+    post cancel_mailing_path(mailing, project_code: @project.code)
+
+    assert_redirected_to dashboard_mailings_path(project_code: @project.code)
+    assert_equal "cancelled", mailing.reload.status
+    assert_equal "sent", recipients.first.reload.status
+    assert_equal "skipped", recipients.second.reload.status
+    assert_equal "invio annullato", recipients.second.skip_reason
+    assert mailing.mailing_recipients.pending.none?
+  end
 end