Merge branch 'main' into nl/3275-slowness-admin-tables

src/registrar/admin.py

@@ -1367,6 +1367,8 @@ class UserDomainRoleAdmin(ListHeaderAdmin, ImportExportModelAdmin):
 
     autocomplete_fields = ["user", "domain"]
 
+    change_form_template = "django/admin/user_domain_role_change_form.html"
+
     # Fixes a bug where non-superusers are redirected to the main page
     def delete_view(self, request, object_id, extra_context=None):
         """Custom delete_view implementation that specifies redirect behaviour"""
@@ -1500,7 +1502,7 @@ class DomainInvitationAdmin(BaseInvitationAdmin):
 
     autocomplete_fields = ["domain"]
 
-    change_form_template = "django/admin/email_clipboard_change_form.html"
+    change_form_template = "django/admin/domain_invitation_change_form.html"
 
     # Select domain invitations to change -> Domain invitations
     def changelist_view(self, request, extra_context=None):

src/registrar/templates/django/admin/domain_invitation_change_form.html

@@ -0,0 +1,14 @@
+{% extends 'django/admin/email_clipboard_change_form.html' %}
+{% load custom_filters %}
+{% load i18n static %}
+
+{% block content_subtitle %}
+    <div class="usa-alert usa-alert--info usa-alert--slim">
+        <div class="usa-alert__body margin-left-1 maxw-none">
+            <p class="usa-alert__text maxw-none">
+                If you add someone to a domain here, it will trigger emails to the invitee and all managers of the domain when you click "save." If you don't want to trigger those emails, use the <a class="usa-link" href="{% url 'admin:registrar_userdomainrole_changelist' %}">User domain roles permissions table</a> instead.
+            </p>
+        </div>
+    </div>
+    {{ block.super }}
+{% endblock %}

src/registrar/templates/django/admin/user_domain_role_change_form.html

@@ -0,0 +1,14 @@
+{% extends 'django/admin/email_clipboard_change_form.html' %}
+{% load custom_filters %}
+{% load i18n static %}
+
+{% block content_subtitle %}
+    <div class="usa-alert usa-alert--info usa-alert--slim">
+        <div class="usa-alert__body margin-left-1 maxw-none">
+            <p class="usa-alert__text maxw-none">
+                If you add someone to a domain here, it will not trigger any emails. To trigger emails, use the <a class="usa-link" href="{% url 'admin:registrar_domaininvitation_changelist' %}">User Domain Role invitations table</a> instead.
+            </p>
+        </div>
+    </div>
+    {{ block.super }}
+{% endblock %}

src/registrar/templates/emails/domain_manager_notification.txt

@@ -0,0 +1,43 @@
+{% autoescape off %}{# In a text file, we don't want to have HTML entities escaped #}
+Hi,{% if domain_manager and domain_manager.first_name %} {{ domain_manager.first_name }}.{% endif %}
+
+A domain manager was invited to {{ domain.name }}.
+DOMAIN: {{ domain.name }}
+INVITED BY: {{ requestor_email }}
+INVITED ON: {{date}}
+MANAGER INVITED: {{ invited_email_address }}
+
+
+----------------------------------------------------------------
+
+
+NEXT STEPS
+
+The person who received the invitation will become a domain manager once they log in to the
+.gov registrar. They'll need to access the registrar using a Login.gov account that's
+associated with the invited email address.
+
+If you need to cancel this invitation or remove the domain manager (because they've already
+logged in), you can do that by going to this domain in the .gov registrar <https://manage.get.gov/>.
+
+
+WHY DID YOU RECEIVE THIS EMAIL? 
+
+You’re listed as a domain manager for {{ domain.name }}, so you’ll receive a notification whenever
+someone is invited to manage that domain.
+
+If you have questions or concerns, reach out to the person who sent the invitation or reply to this email.
+
+
+THANK YOU
+.Gov helps the public identify official, trusted information. Thank you for using a .gov domain.
+
+----------------------------------------------------------------
+
+The .gov team
+Contact us: <https://get.gov/contact/>
+Learn about .gov <https://get.gov>
+
+The .gov registry is a part of the Cybersecurity and Infrastructure Security Agency
+(CISA) <https://cisa.gov/>
+{% endautoescape %}

src/registrar/templates/emails/domain_manager_notification_subject.txt

@@ -0,0 +1 @@
+A domain manager was invited to {{ domain.name }}

src/registrar/tests/test_admin.py

@@ -166,6 +166,29 @@ class TestDomainInvitationAdmin(TestCase):
         )
         self.assertContains(response, "Show more")
 
+    @less_console_noise_decorator
+    def test_has_change_form_description(self):
+        """Tests if this model has a model description on the change form view"""
+        self.client.force_login(self.superuser)
+
+        domain, _ = Domain.objects.get_or_create(name="systemofadown.com")
+
+        domain_invitation, _ = DomainInvitation.objects.get_or_create(email="toxicity@systemofadown.com", domain=domain)
+
+        response = self.client.get(
+            "/admin/registrar/domaininvitation/{}/change/".format(domain_invitation.pk),
+            follow=True,
+        )
+
+        # Make sure that the page is loaded correctly
+        self.assertEqual(response.status_code, 200)
+
+        # Test for a description snippet
+        self.assertContains(
+            response,
+            "If you add someone to a domain here, it will trigger emails to the invitee and all managers of the domain",
+        )
+
     @less_console_noise_decorator
     def test_get_filters(self):
         """Ensures that our filters are displaying correctly"""
@@ -1957,6 +1980,31 @@ class TestUserDomainRoleAdmin(TestCase):
         )
         self.assertContains(response, "Show more")
 
+    @less_console_noise_decorator
+    def test_has_change_form_description(self):
+        """Tests if this model has a model description on the change form view"""
+        self.client.force_login(self.superuser)
+
+        domain, _ = Domain.objects.get_or_create(name="systemofadown.com")
+
+        user_domain_role, _ = UserDomainRole.objects.get_or_create(
+            user=self.superuser, domain=domain, role=[UserDomainRole.Roles.MANAGER]
+        )
+
+        response = self.client.get(
+            "/admin/registrar/userdomainrole/{}/change/".format(user_domain_role.pk),
+            follow=True,
+        )
+
+        # Make sure that the page is loaded correctly
+        self.assertEqual(response.status_code, 200)
+
+        # Test for a description snippet
+        self.assertContains(
+            response,
+            "If you add someone to a domain here, it will not trigger any emails.",
+        )
+
     def test_domain_sortable(self):
         """Tests if the UserDomainrole sorts by domain correctly"""
         with less_console_noise():

src/registrar/tests/test_email_invitations.py

@@ -0,0 +1,311 @@
+import unittest
+from unittest.mock import patch, MagicMock
+from datetime import date
+from registrar.utility.email import EmailSendingError
+from registrar.utility.email_invitations import send_domain_invitation_email
+
+from api.tests.common import less_console_noise_decorator
+
+
+class DomainInvitationEmail(unittest.TestCase):
+
+    @less_console_noise_decorator
+    @patch("registrar.utility.email_invitations.send_templated_email")
+    @patch("registrar.utility.email_invitations.UserDomainRole.objects.filter")
+    @patch("registrar.utility.email_invitations.validate_invitation")
+    @patch("registrar.utility.email_invitations.get_requestor_email")
+    @patch("registrar.utility.email_invitations.send_invitation_email")
+    @patch("registrar.utility.email_invitations.normalize_domains")
+    def test_send_domain_invitation_email(
+        self,
+        mock_normalize_domains,
+        mock_send_invitation_email,
+        mock_get_requestor_email,
+        mock_validate_invitation,
+        mock_user_domain_role_filter,
+        mock_send_templated_email,
+    ):
+        """Test sending domain invitation email for one domain.
+        Should also send emails to manager of that domain.
+        """
+        # Setup
+        mock_domain = MagicMock(name="domain1")
+        mock_domain.name = "example.com"
+        mock_normalize_domains.return_value = [mock_domain]
+
+        mock_requestor = MagicMock()
+        mock_requestor_email = "requestor@example.com"
+        mock_get_requestor_email.return_value = mock_requestor_email
+
+        mock_user1 = MagicMock()
+        mock_user1.email = "manager1@example.com"
+
+        mock_user_domain_role_filter.return_value = [MagicMock(user=mock_user1)]
+
+        email = "invitee@example.com"
+        is_member_of_different_org = False
+
+        # Call the function
+        send_domain_invitation_email(
+            email=email,
+            requestor=mock_requestor,
+            domains=mock_domain,
+            is_member_of_different_org=is_member_of_different_org,
+        )
+
+        # Assertions
+        mock_normalize_domains.assert_called_once_with(mock_domain)
+        mock_get_requestor_email.assert_called_once_with(mock_requestor, [mock_domain])
+        mock_validate_invitation.assert_called_once_with(
+            email, [mock_domain], mock_requestor, is_member_of_different_org
+        )
+        mock_send_invitation_email.assert_called_once_with(email, mock_requestor_email, [mock_domain], None)
+        mock_user_domain_role_filter.assert_called_once_with(domain=mock_domain)
+        mock_send_templated_email.assert_called_once_with(
+            "emails/domain_manager_notification.txt",
+            "emails/domain_manager_notification_subject.txt",
+            to_address=mock_user1.email,
+            context={
+                "domain": mock_domain,
+                "requestor_email": mock_requestor_email,
+                "invited_email_address": email,
+                "domain_manager": mock_user1,
+                "date": date.today(),
+            },
+        )
+
+    @less_console_noise_decorator
+    @patch("registrar.utility.email_invitations.send_templated_email")
+    @patch("registrar.utility.email_invitations.UserDomainRole.objects.filter")
+    @patch("registrar.utility.email_invitations.validate_invitation")
+    @patch("registrar.utility.email_invitations.get_requestor_email")
+    @patch("registrar.utility.email_invitations.send_invitation_email")
+    @patch("registrar.utility.email_invitations.normalize_domains")
+    def test_send_domain_invitation_email_multiple_domains(
+        self,
+        mock_normalize_domains,
+        mock_send_invitation_email,
+        mock_get_requestor_email,
+        mock_validate_invitation,
+        mock_user_domain_role_filter,
+        mock_send_templated_email,
+    ):
+        """Test sending domain invitation email for multiple domains.
+        Should also send emails to managers of each domain.
+        """
+        # Setup
+        # Create multiple mock domains
+        mock_domain1 = MagicMock(name="domain1")
+        mock_domain1.name = "example.com"
+        mock_domain2 = MagicMock(name="domain2")
+        mock_domain2.name = "example.org"
+
+        mock_normalize_domains.return_value = [mock_domain1, mock_domain2]
+
+        mock_requestor = MagicMock()
+        mock_requestor_email = "requestor@example.com"
+        mock_get_requestor_email.return_value = mock_requestor_email
+
+        mock_user1 = MagicMock()
+        mock_user1.email = "manager1@example.com"
+        mock_user2 = MagicMock()
+        mock_user2.email = "manager2@example.com"
+
+        # Configure domain roles for each domain
+        def filter_side_effect(domain):
+            if domain == mock_domain1:
+                return [MagicMock(user=mock_user1)]
+            elif domain == mock_domain2:
+                return [MagicMock(user=mock_user2)]
+            return []
+
+        mock_user_domain_role_filter.side_effect = filter_side_effect
+
+        email = "invitee@example.com"
+        is_member_of_different_org = False
+
+        # Call the function
+        send_domain_invitation_email(
+            email=email,
+            requestor=mock_requestor,
+            domains=[mock_domain1, mock_domain2],
+            is_member_of_different_org=is_member_of_different_org,
+        )
+
+        # Assertions
+        mock_normalize_domains.assert_called_once_with([mock_domain1, mock_domain2])
+        mock_get_requestor_email.assert_called_once_with(mock_requestor, [mock_domain1, mock_domain2])
+        mock_validate_invitation.assert_called_once_with(
+            email, [mock_domain1, mock_domain2], mock_requestor, is_member_of_different_org
+        )
+        mock_send_invitation_email.assert_called_once_with(
+            email, mock_requestor_email, [mock_domain1, mock_domain2], None
+        )
+
+        # Check that domain manager emails were sent for both domains
+        mock_user_domain_role_filter.assert_any_call(domain=mock_domain1)
+        mock_user_domain_role_filter.assert_any_call(domain=mock_domain2)
+
+        mock_send_templated_email.assert_any_call(
+            "emails/domain_manager_notification.txt",
+            "emails/domain_manager_notification_subject.txt",
+            to_address=mock_user1.email,
+            context={
+                "domain": mock_domain1,
+                "requestor_email": mock_requestor_email,
+                "invited_email_address": email,
+                "domain_manager": mock_user1,
+                "date": date.today(),
+            },
+        )
+        mock_send_templated_email.assert_any_call(
+            "emails/domain_manager_notification.txt",
+            "emails/domain_manager_notification_subject.txt",
+            to_address=mock_user2.email,
+            context={
+                "domain": mock_domain2,
+                "requestor_email": mock_requestor_email,
+                "invited_email_address": email,
+                "domain_manager": mock_user2,
+                "date": date.today(),
+            },
+        )
+
+        # Verify the total number of calls to send_templated_email
+        self.assertEqual(mock_send_templated_email.call_count, 2)
+
+    @less_console_noise_decorator
+    @patch("registrar.utility.email_invitations.validate_invitation")
+    def test_send_domain_invitation_email_raises_invite_validation_exception(self, mock_validate_invitation):
+        """Test sending domain invitation email for one domain and assert exception
+        when invite validation fails.
+        """
+        # Setup
+        mock_validate_invitation.side_effect = ValueError("Validation failed")
+        email = "invitee@example.com"
+        requestor = MagicMock()
+        domain = MagicMock()
+
+        # Call and assert exception
+        with self.assertRaises(ValueError) as context:
+            send_domain_invitation_email(email, requestor, domain, is_member_of_different_org=False)
+
+        self.assertEqual(str(context.exception), "Validation failed")
+        mock_validate_invitation.assert_called_once()
+
+    @less_console_noise_decorator
+    @patch("registrar.utility.email_invitations.get_requestor_email")
+    def test_send_domain_invitation_email_raises_get_requestor_email_exception(self, mock_get_requestor_email):
+        """Test sending domain invitation email for one domain and assert exception
+        when get_requestor_email fails.
+        """
+        # Setup
+        mock_get_requestor_email.side_effect = ValueError("Validation failed")
+        email = "invitee@example.com"
+        requestor = MagicMock()
+        domain = MagicMock()
+
+        # Call and assert exception
+        with self.assertRaises(ValueError) as context:
+            send_domain_invitation_email(email, requestor, domain, is_member_of_different_org=False)
+
+        self.assertEqual(str(context.exception), "Validation failed")
+        mock_get_requestor_email.assert_called_once()
+
+    @less_console_noise_decorator
+    @patch("registrar.utility.email_invitations.validate_invitation")
+    @patch("registrar.utility.email_invitations.get_requestor_email")
+    @patch("registrar.utility.email_invitations.send_invitation_email")
+    @patch("registrar.utility.email_invitations.normalize_domains")
+    def test_send_domain_invitation_email_raises_sending_email_exception(
+        self,
+        mock_normalize_domains,
+        mock_send_invitation_email,
+        mock_get_requestor_email,
+        mock_validate_invitation,
+    ):
+        """Test sending domain invitation email for one domain and assert exception
+        when send_invitation_email fails.
+        """
+        # Setup
+        mock_domain = MagicMock(name="domain1")
+        mock_domain.name = "example.com"
+        mock_normalize_domains.return_value = [mock_domain]
+
+        mock_requestor = MagicMock()
+        mock_requestor_email = "requestor@example.com"
+        mock_get_requestor_email.return_value = mock_requestor_email
+
+        mock_user1 = MagicMock()
+        mock_user1.email = "manager1@example.com"
+
+        email = "invitee@example.com"
+        is_member_of_different_org = False
+
+        mock_send_invitation_email.side_effect = EmailSendingError("Error sending email")
+
+        # Call and assert exception
+        with self.assertRaises(EmailSendingError) as context:
+            send_domain_invitation_email(
+                email=email,
+                requestor=mock_requestor,
+                domains=mock_domain,
+                is_member_of_different_org=is_member_of_different_org,
+            )
+
+        # Assertions
+        mock_normalize_domains.assert_called_once_with(mock_domain)
+        mock_get_requestor_email.assert_called_once_with(mock_requestor, [mock_domain])
+        mock_validate_invitation.assert_called_once_with(
+            email, [mock_domain], mock_requestor, is_member_of_different_org
+        )
+        self.assertEqual(str(context.exception), "Error sending email")
+
+    @less_console_noise_decorator
+    @patch("registrar.utility.email_invitations.send_emails_to_domain_managers")
+    @patch("registrar.utility.email_invitations.validate_invitation")
+    @patch("registrar.utility.email_invitations.get_requestor_email")
+    @patch("registrar.utility.email_invitations.send_invitation_email")
+    @patch("registrar.utility.email_invitations.normalize_domains")
+    def test_send_domain_invitation_email_manager_emails_send_mail_exception(
+        self,
+        mock_normalize_domains,
+        mock_send_invitation_email,
+        mock_get_requestor_email,
+        mock_validate_invitation,
+        mock_send_domain_manager_emails,
+    ):
+        """Test sending domain invitation email for one domain and assert exception
+        when send_emails_to_domain_managers fails.
+        """
+        # Setup
+        mock_domain = MagicMock(name="domain1")
+        mock_domain.name = "example.com"
+        mock_normalize_domains.return_value = [mock_domain]
+
+        mock_requestor = MagicMock()
+        mock_requestor_email = "requestor@example.com"
+        mock_get_requestor_email.return_value = mock_requestor_email
+
+        email = "invitee@example.com"
+        is_member_of_different_org = False
+
+        mock_send_domain_manager_emails.side_effect = EmailSendingError("Error sending email")
+
+        # Call and assert exception
+        with self.assertRaises(EmailSendingError) as context:
+            send_domain_invitation_email(
+                email=email,
+                requestor=mock_requestor,
+                domains=mock_domain,
+                is_member_of_different_org=is_member_of_different_org,
+            )
+
+        # Assertions
+        mock_normalize_domains.assert_called_once_with(mock_domain)
+        mock_get_requestor_email.assert_called_once_with(mock_requestor, [mock_domain])
+        mock_validate_invitation.assert_called_once_with(
+            email, [mock_domain], mock_requestor, is_member_of_different_org
+        )
+        mock_send_invitation_email.assert_called_once_with(email, mock_requestor_email, [mock_domain], None)
+        self.assertEqual(str(context.exception), "Error sending email")

src/registrar/tests/test_views_domain.py

@@ -9,7 +9,7 @@ from registrar.utility.email import EmailSendingError
 from waffle.testutils import override_flag
 from api.tests.common import less_console_noise_decorator
 from registrar.models.utility.portfolio_helper import UserPortfolioPermissionChoices, UserPortfolioRoleChoices
-from .common import MockEppLib, MockSESClient, create_user  # type: ignore
+from .common import MockEppLib, create_user  # type: ignore
 from django_webtest import WebTest  # type: ignore
 import boto3_mocking  # type: ignore
 
@@ -750,11 +750,12 @@ class TestDomainManagers(TestDomainOverview):
         response = self.client.get(reverse("domain-users-add", kwargs={"pk": self.domain.id}))
         self.assertContains(response, "Add a domain manager")
 
-    @boto3_mocking.patching
     @less_console_noise_decorator
-    def test_domain_user_add_form(self):
+    @patch("registrar.views.domain.send_domain_invitation_email")
+    def test_domain_user_add_form(self, mock_send_domain_email):
         """Adding an existing user works."""
         get_user_model().objects.get_or_create(email="mayor@igorville.gov")
+        user = User.objects.filter(email="mayor@igorville.gov").first()
         add_page = self.app.get(reverse("domain-users-add", kwargs={"pk": self.domain.id}))
         session_id = self.app.cookies[settings.SESSION_COOKIE_NAME]
 
@@ -762,10 +763,15 @@ class TestDomainManagers(TestDomainOverview):
 
         self.app.set_cookie(settings.SESSION_COOKIE_NAME, session_id)
 
-        mock_client = MockSESClient()
+        success_result = add_page.form.submit()
-        with boto3_mocking.clients.handler_for("sesv2", mock_client):
+
-            with less_console_noise():
+        mock_send_domain_email.assert_called_once_with(
-                success_result = add_page.form.submit()
+            email="mayor@igorville.gov",
+            requestor=self.user,
+            domains=self.domain,
+            is_member_of_different_org=None,
+            requested_user=user,
+        )
 
         self.assertEqual(success_result.status_code, 302)
         self.assertEqual(
@@ -974,13 +980,13 @@ class TestDomainManagers(TestDomainOverview):
         success_page = success_result.follow()
         self.assertContains(success_page, "Failed to send email.")
 
-    @boto3_mocking.patching
     @less_console_noise_decorator
-    def test_domain_invitation_created(self):
+    @patch("registrar.views.domain.send_domain_invitation_email")
+    def test_domain_invitation_created(self, mock_send_domain_email):
         """Add user on a nonexistent email creates an invitation.
 
         Adding a non-existent user sends an email as a side-effect, so mock
-        out the boto3 SES email sending here.
+        out send_domain_invitation_email here.
         """
         # make sure there is no user with this email
         email_address = "mayor@igorville.gov"
@@ -993,10 +999,11 @@ class TestDomainManagers(TestDomainOverview):
         add_page.form["email"] = email_address
         self.app.set_cookie(settings.SESSION_COOKIE_NAME, session_id)
 
-        mock_client = MockSESClient()
+        success_result = add_page.form.submit()
-        with boto3_mocking.clients.handler_for("sesv2", mock_client):
+
-            with less_console_noise():
+        mock_send_domain_email.assert_called_once_with(
-                success_result = add_page.form.submit()
+            email="mayor@igorville.gov", requestor=self.user, domains=self.domain, is_member_of_different_org=None
+        )
 
         self.app.set_cookie(settings.SESSION_COOKIE_NAME, session_id)
         success_page = success_result.follow()
@@ -1005,13 +1012,13 @@ class TestDomainManagers(TestDomainOverview):
         self.assertContains(success_page, "Cancel")  # link to cancel invitation
         self.assertTrue(DomainInvitation.objects.filter(email=email_address).exists())
 
-    @boto3_mocking.patching
     @less_console_noise_decorator
-    def test_domain_invitation_created_for_caps_email(self):
+    @patch("registrar.views.domain.send_domain_invitation_email")
+    def test_domain_invitation_created_for_caps_email(self, mock_send_domain_email):
         """Add user on a nonexistent email with CAPS creates an invitation to lowercase email.
 
         Adding a non-existent user sends an email as a side-effect, so mock
-        out the boto3 SES email sending here.
+        out send_domain_invitation_email here.
         """
         # make sure there is no user with this email
         email_address = "mayor@igorville.gov"
@@ -1025,9 +1032,11 @@ class TestDomainManagers(TestDomainOverview):
         add_page.form["email"] = caps_email_address
         self.app.set_cookie(settings.SESSION_COOKIE_NAME, session_id)
 
-        mock_client = MockSESClient()
+        success_result = add_page.form.submit()
-        with boto3_mocking.clients.handler_for("sesv2", mock_client):
+
-            success_result = add_page.form.submit()
+        mock_send_domain_email.assert_called_once_with(
+            email="mayor@igorville.gov", requestor=self.user, domains=self.domain, is_member_of_different_org=None
+        )
 
         self.app.set_cookie(settings.SESSION_COOKIE_NAME, session_id)
         success_page = success_result.follow()

src/registrar/utility/email_invitations.py

@@ -1,6 +1,6 @@
+from datetime import date
 from django.conf import settings
-from registrar.models import DomainInvitation
+from registrar.models import Domain, DomainInvitation, UserDomainRole
-from registrar.models.domain import Domain
 from registrar.utility.errors import (
     AlreadyDomainInvitedError,
     AlreadyDomainManagerError,
@@ -41,8 +41,47 @@ def send_domain_invitation_email(
 
     send_invitation_email(email, requestor_email, domains, requested_user)
 
+    # send emails to domain managers
+    for domain in domains:
+        send_emails_to_domain_managers(
+            email=email,
+            requestor_email=requestor_email,
+            domain=domain,
+            requested_user=requested_user,
+        )
 
-def normalize_domains(domains):
+
+def send_emails_to_domain_managers(email: str, requestor_email, domain: Domain, requested_user=None):
+    """
+    Notifies all domain managers of the provided domain of a change
+    Raises:
+        EmailSendingError
+    """
+    # Get each domain manager from list
+    user_domain_roles = UserDomainRole.objects.filter(domain=domain)
+    for user_domain_role in user_domain_roles:
+        # Send email to each domain manager
+        user = user_domain_role.user
+        try:
+            send_templated_email(
+                "emails/domain_manager_notification.txt",
+                "emails/domain_manager_notification_subject.txt",
+                to_address=user.email,
+                context={
+                    "domain": domain,
+                    "requestor_email": requestor_email,
+                    "invited_email_address": email,
+                    "domain_manager": user,
+                    "date": date.today(),
+                },
+            )
+        except EmailSendingError as err:
+            raise EmailSendingError(
+                f"Could not send email manager notification to {user.email} for domain: {domain.name}"
+            ) from err
+
+
+def normalize_domains(domains: Domain | list[Domain]) -> list[Domain]:
     """Ensures domains is always a list."""
     return [domains] if isinstance(domains, Domain) else domains
 
@@ -69,6 +108,8 @@ def validate_invitation(email, domains, requestor, is_member_of_different_org):
     for domain in domains:
         validate_existing_invitation(email, domain)
 
+        # NOTE: should we also be validating against existing user_domain_roles
+
 
 def check_outside_org_membership(email, requestor, is_member_of_different_org):
     """Raise an error if the email belongs to a different organization."""