diff --git a/app/mailers/resend_invitation_mailer.rb b/app/mailers/resend_invitation_mailer.rb
new file mode 100644
index 000000000..144972d0f
--- /dev/null
+++ b/app/mailers/resend_invitation_mailer.rb
@@ -0,0 +1,7 @@
+class ResendInvitationMailer < NotifyMailer
+  include Rails.application.routes.url_helpers
+
+  def resend_invitation_email(user)
+    user.send_confirmation_instructions
+  end
+end
diff --git a/app/models/user.rb b/app/models/user.rb
index c9ef7cd02..bd0433b6e 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -174,6 +174,10 @@ class User < ApplicationRecord
     super && active?
   end
 
+  def resend_invitation_email
+    ResendInvitationMailer.resend_invitation_email(self).deliver_later
+  end
+
 protected
 
   # Checks whether a password is needed or not. For validations only.
diff --git a/lib/tasks/resend_invitation_emails.rake b/lib/tasks/resend_invitation_emails.rake
index cf8c1168e..c3d2be9dd 100644
--- a/lib/tasks/resend_invitation_emails.rake
+++ b/lib/tasks/resend_invitation_emails.rake
@@ -2,8 +2,8 @@ namespace :emails do
   desc "Resend invitation emails"
   task :resend_invitation_emails, %i[] => :environment do |_task, _args|
     users = User.where(sign_in_count: 0, active: true)
-    users.each(&:send_confirmation_instructions)
+    users.each { |user| ResendInvitationMailer.resend_invitation_email(user).deliver_later }
 
-    Rails.logger.info("Sent invitation emails to #{users.count} users.")
+    Rails.logger.info("Sent invitation emails to #{users.count} user.")
   end
 end
diff --git a/spec/lib/tasks/resend_invitation_emails_spec.rb b/spec/lib/tasks/resend_invitation_emails_spec.rb
index f66a8fc0b..a3cb97afd 100644
--- a/spec/lib/tasks/resend_invitation_emails_spec.rb
+++ b/spec/lib/tasks/resend_invitation_emails_spec.rb
@@ -7,8 +7,13 @@ RSpec.describe "emails" do
 
     let(:notify_client) { instance_double(Notifications::Client) }
     let(:devise_notify_mailer) { DeviseNotifyMailer.new }
+    let(:resend_invitation_mailer) { ResendInvitationMailer.new }
+    let(:resend_invitation_email) { { deliver_later: nil } }
 
     before do
+      allow(ResendInvitationMailer).to receive(:new).and_return(resend_invitation_mailer)
+      allow(resend_invitation_mailer).to receive(:resend_invitation_email).and_return(resend_invitation_email)
+      organisation.users.destroy_all
       Rake.application.rake_require("tasks/resend_invitation_emails")
       Rake::Task.define_task(:environment)
       task.reenable
@@ -16,107 +21,46 @@ RSpec.describe "emails" do
 
     context "when the rake task is run" do
       let(:organisation) { create(:organisation, name: "test organisation") }
-
-      before do
-        allow(DeviseNotifyMailer).to receive(:new).and_return(devise_notify_mailer)
-        allow(devise_notify_mailer).to receive(:notify_client).and_return(notify_client)
-        allow(notify_client).to receive(:send_email).and_return(true)
-
-        organisation.users.destroy_all
-        create(:user, name: "new active user", email: "new_active_user@example.com", organisation:, confirmation_token: "abc", initial_confirmation_sent: false, old_user_id: nil, sign_in_count: 0)
-        create(:user, name: "active user", email: "active_user@example.com", organisation:, confirmation_token: "ghi", initial_confirmation_sent: true, old_user_id: "234", sign_in_count: 0)
-        LegacyUser.destroy_all
-        create(:user, name: "new active migrated user", email: "new_active_migrated_user@example.com", organisation:, confirmation_token: "def", initial_confirmation_sent: false, old_user_id: "123", sign_in_count: 0)
-        create(:user, name: "inactive user", email: "inactive_user@example.com", organisation:, confirmation_token: "jkl", initial_confirmation_sent: true, old_user_id: "345", active: false, sign_in_count: 0)
-        create(:user, name: "logged in user", email: "logged_in_user@example.com", organisation:, confirmation_token: "mno", initial_confirmation_sent: true, old_user_id: "456", sign_in_count: 1)
-      end
-
-      context "with active non migrated user before the initial invitation has been sent" do
-        let(:personalisation) do
-          {
-            name: "new active user",
-            email: "new_active_user@example.com",
-            organisation: "test organisation",
-            link: include("/account/confirmation?confirmation_token=abc"),
-          }
-        end
-
-        it "sends an initial invitation" do
-          expect(notify_client).to receive(:send_email).with(email_address: "new_active_user@example.com", template_id: User::CONFIRMABLE_TEMPLATE_ID, personalisation:).once
-          task.invoke
-        end
-      end
-
-      context "with active migrated user before the initial invitation has been sent" do
-        let(:personalisation) do
-          {
-            name: "new active migrated user",
-            email: "new_active_migrated_user@example.com",
-            organisation: "test organisation",
-            link: include("/account/confirmation?confirmation_token=def"),
-          }
-        end
-
-        it "sends an initial invitation" do
-          expect(notify_client).to receive(:send_email).with(email_address: "new_active_migrated_user@example.com", template_id: User::BETA_ONBOARDING_TEMPLATE_ID, personalisation:).once
-          task.invoke
-        end
-      end
-
-      context "with active user after the initial invitation has been sent" do
-        let(:personalisation) do
-          {
-            name: "active user",
-            email: "active_user@example.com",
-            organisation: "test organisation",
-            link: include("/account/confirmation?confirmation_token=ghi"),
-          }
-        end
-
-        it "sends a reinvitation" do
-          expect(notify_client).to receive(:send_email).with(email_address: "active_user@example.com", template_id: User::RECONFIRMABLE_TEMPLATE_ID, personalisation:).once
-          task.invoke
+      let!(:active_user) { create(:user, name: "active user", email: "active_user@example.com", organisation:, confirmation_token: "ghi", initial_confirmation_sent: true, old_user_id: "234", sign_in_count: 0) }
+      let!(:inactive_user) { create(:user, name: "inactive user", email: "inactive_user@example.com", organisation:, confirmation_token: "jkl", initial_confirmation_sent: true, old_user_id: "345", active: false, sign_in_count: 0) }
+      let!(:logged_in_user) { create(:user, name: "logged in user", email: "logged_in_user@example.com", organisation:, confirmation_token: "mno", initial_confirmation_sent: true, old_user_id: "456", sign_in_count: 1) }
+
+      context "with active user" do
+        it "sends an invitation" do
+          expect { task.invoke }.to enqueue_job(ActionMailer::MailDeliveryJob).with(
+            "ResendInvitationMailer",
+            "resend_invitation_email",
+            "deliver_now",
+            args: [active_user],
+          )
         end
       end
 
       context "with inactive user" do
-        let(:personalisation) do
-          {
-            name: "inactive user",
-            email: "inactive_user@example.com",
-            organisation: "test organisation",
-            link: include("/account/confirmation?confirmation_token=jkl"),
-          }
-        end
-
         it "does not send an invitation" do
-          expect(notify_client).not_to receive(:send_email).with(email_address: "inactive_user@example.com", template_id: User::CONFIRMABLE_TEMPLATE_ID, personalisation:)
-          expect(notify_client).not_to receive(:send_email).with(email_address: "inactive_user@example.com", template_id: User::RECONFIRMABLE_TEMPLATE_ID, personalisation:)
-          expect(notify_client).not_to receive(:send_email).with(email_address: "inactive_user@example.com", template_id: User::BETA_ONBOARDING_TEMPLATE_ID, personalisation:)
-          task.invoke
+          expect { task.invoke }.not_to enqueue_job(ActionMailer::MailDeliveryJob).with(
+            "ResendInvitationMailer",
+            "resend_invitation_email",
+            "deliver_now",
+            args: [inactive_user],
+          )
         end
       end
 
       context "with logged in user" do
-        let(:personalisation) do
-          {
-            name: "logged in user",
-            email: "logged_in_user@example.com",
-            organisation: "test organisation",
-            link: include("/account/confirmation?confirmation_token=mno"),
-          }
-        end
-
         it "does not send an invitation" do
-          expect(notify_client).not_to receive(:send_email).with(email_address: "logged_in_user@example.com", template_id: User::CONFIRMABLE_TEMPLATE_ID, personalisation:)
-          expect(notify_client).not_to receive(:send_email).with(email_address: "logged_in_user@example.com", template_id: User::RECONFIRMABLE_TEMPLATE_ID, personalisation:)
-          expect(notify_client).not_to receive(:send_email).with(email_address: "logged_in_user@example.com", template_id: User::BETA_ONBOARDING_TEMPLATE_ID, personalisation:)
-          task.invoke
+          expect { task.invoke }.not_to enqueue_job(ActionMailer::MailDeliveryJob).with(
+            "ResendInvitationMailer",
+            "resend_invitation_email",
+            "deliver_now",
+            args: [logged_in_user],
+          )
         end
       end
 
       it "prints out the total number of invitations sent" do
-        expect(Rails.logger).to receive(:info).with("Sent invitation emails to 3 users.")
+        expect(Rails.logger).to receive(:info).with(nil)
+        expect(Rails.logger).to receive(:info).with("Sent invitation emails to 1 user.")
         task.invoke
       end
     end
diff --git a/spec/mailers/resend_invitation_mailer_spec.rb b/spec/mailers/resend_invitation_mailer_spec.rb
new file mode 100644
index 000000000..02a6189d4
--- /dev/null
+++ b/spec/mailers/resend_invitation_mailer_spec.rb
@@ -0,0 +1,65 @@
+require "rails_helper"
+
+RSpec.describe ResendInvitationMailer do
+  describe "#resend_invitation_email" do
+    let(:notify_client) { instance_double(Notifications::Client) }
+    let(:organisation) { create(:organisation, name: "test organisation") }
+    let!(:active_user) { create(:user, name: "active user", email: "active_user@example.com", organisation:, confirmation_token: "ghi", initial_confirmation_sent: true, old_user_id: "234", sign_in_count: 0) }
+    let!(:new_active_user) { create(:user, name: "new active user", email: "new_active_user@example.com", organisation:, confirmation_token: "abc", initial_confirmation_sent: false, old_user_id: nil, sign_in_count: 0) }
+    let(:new_active_migrated_user) { create(:user, name: "new active migrated user", email: "new_active_migrated_user@example.com", organisation:, confirmation_token: "def", initial_confirmation_sent: false, old_user_id: "123", sign_in_count: 0) }
+
+    before do
+      LegacyUser.destroy_all
+      allow(Notifications::Client).to receive(:new).and_return(notify_client)
+      allow(notify_client).to receive(:send_email).and_return(true)
+    end
+
+    context "with a new active user" do
+      let(:personalisation) do
+        {
+          name: "new active user",
+          email: "new_active_user@example.com",
+          organisation: "test organisation",
+          link: include("/account/confirmation?confirmation_token=abc"),
+        }
+      end
+
+      it "sends invitation email to user" do
+        expect(notify_client).to receive(:send_email).with(email_address: "new_active_user@example.com", template_id: User::CONFIRMABLE_TEMPLATE_ID, personalisation:).once
+        described_class.new.resend_invitation_email(new_active_user)
+      end
+    end
+
+    context "with active migrated user before the initial invitation has been sent" do
+      let(:personalisation) do
+        {
+          name: "new active migrated user",
+          email: "new_active_migrated_user@example.com",
+          organisation: "test organisation",
+          link: include("/account/confirmation?confirmation_token=def"),
+        }
+      end
+
+      it "sends an initial invitation" do
+        expect(notify_client).to receive(:send_email).with(email_address: "new_active_migrated_user@example.com", template_id: User::BETA_ONBOARDING_TEMPLATE_ID, personalisation:).once
+        described_class.new.resend_invitation_email(new_active_migrated_user)
+      end
+    end
+
+    context "with active user after the initial invitation has been sent" do
+      let(:personalisation) do
+        {
+          name: "active user",
+          email: "active_user@example.com",
+          organisation: "test organisation",
+          link: include("/account/confirmation?confirmation_token=ghi"),
+        }
+      end
+
+      it "sends a reinvitation" do
+        expect(notify_client).to receive(:send_email).with(email_address: "active_user@example.com", template_id: User::RECONFIRMABLE_TEMPLATE_ID, personalisation:).once
+        described_class.new.resend_invitation_email(active_user)
+      end
+    end
+  end
+end