diff --git a/app/main/views/service_settings.py b/app/main/views/service_settings.py
index 4845aa9cf..c65609518 100644
--- a/app/main/views/service_settings.py
+++ b/app/main/views/service_settings.py
@@ -440,10 +440,9 @@ def service_edit_email_reply_to(service_id, reply_to_email_id):
 @login_required
 @user_has_permissions('manage_service')
 def service_delete_email_reply_to(service_id, reply_to_email_id):
-    service_api_client.update_reply_to_email_address(
-        current_service['id'],
+    service_api_client.delete_reply_to_email_address(
+        service_id=current_service['id'],
         reply_to_email_id=reply_to_email_id,
-        active=False,
     )
     return redirect(url_for('.service_email_reply_to', service_id=service_id))
 
@@ -723,10 +722,9 @@ def service_edit_sms_sender(service_id, sms_sender_id):
 @login_required
 @user_has_permissions('manage_service')
 def service_delete_sms_sender(service_id, sms_sender_id):
-    service_api_client.update_sms_sender(
-        current_service['id'],
+    service_api_client.delete_sms_sender(
+        service_id=current_service['id'],
         sms_sender_id=sms_sender_id,
-        active=False,
     )
     return redirect(url_for('.service_sms_senders', service_id=service_id))
 
diff --git a/app/notify_client/service_api_client.py b/app/notify_client/service_api_client.py
index 6fdd95c82..e0c06ec78 100644
--- a/app/notify_client/service_api_client.py
+++ b/app/notify_client/service_api_client.py
@@ -374,25 +374,7 @@ class ServiceAPIClient(NotifyAdminAPIClient):
         )
 
     @cache.delete('service-{service_id}')
-    def update_reply_to_email_address(
-        self,
-        service_id,
-        reply_to_email_id,
-        email_address=None,
-        active=None,
-        is_default=False
-    ):
-        data = {
-            "is_default": is_default
-        }
-        if email_address is not None:
-            data.update({
-                'email_address': email_address
-            })
-        if active is not None:
-            data.update({
-                'active': active
-            })
+    def update_reply_to_email_address(self, service_id, reply_to_email_id, email_address, is_default=False):
         return self.post(
             "/service/{}/email-reply-to/{}".format(
                 service_id,
@@ -404,6 +386,13 @@ class ServiceAPIClient(NotifyAdminAPIClient):
             }
         )
 
+    @cache.delete('service-{service_id}')
+    def delete_reply_to_email_address(self, service_id, reply_to_email_id):
+        return self.post(
+            "/service/{}/email-reply-to/{}/archive".format(service_id, reply_to_email_id),
+            data=None
+        )
+
     def get_letter_contacts(self, service_id):
         return self.get("/service/{}/letter-contact".format(service_id))
 
@@ -457,21 +446,20 @@ class ServiceAPIClient(NotifyAdminAPIClient):
         return self.post("/service/{}/sms-sender".format(service_id), data=data)
 
     @cache.delete('service-{service_id}')
-    def update_sms_sender(self, service_id, sms_sender_id, sms_sender=None, active=None, is_default=False):
-        data = {
-            "is_default": is_default,
-        }
-        if sms_sender is not None:
-            data.update({
-                "sms_sender": sms_sender,
-            })
-        if active is not None:
-            data.update({
-                "active": active,
-            })
+    def update_sms_sender(self, service_id, sms_sender_id, sms_sender, is_default=False):
         return self.post(
             "/service/{}/sms-sender/{}".format(service_id, sms_sender_id),
-            data=data
+            data={
+                "sms_sender": sms_sender,
+                "is_default": is_default
+            }
+        )
+
+    @cache.delete('service-{service_id}')
+    def delete_sms_sender(self, service_id, sms_sender_id):
+        return self.post(
+            "/service/{}/sms-sender/{}/archive".format(service_id, sms_sender_id),
+            data=None
         )
 
     def get_service_callback_api(self, service_id, callback_api_id):
diff --git a/tests/app/main/views/test_service_settings.py b/tests/app/main/views/test_service_settings.py
index cd2f8fd0a..0adc8711c 100644
--- a/tests/app/main/views/test_service_settings.py
+++ b/tests/app/main/views/test_service_settings.py
@@ -1193,9 +1193,9 @@ def test_delete_reply_to_email_address(
     service_one,
     fake_uuid,
     get_non_default_reply_to_email_address,
-    mock_update_reply_to_email_address,
+    mocker,
 ):
-
+    mock_delete = mocker.patch('app.service_api_client.delete_reply_to_email_address')
     client_request.post(
         '.service_delete_email_reply_to',
         service_id=SERVICE_ONE_ID,
@@ -1206,12 +1206,7 @@ def test_delete_reply_to_email_address(
             _external=True,
         )
     )
-
-    mock_update_reply_to_email_address.assert_called_once_with(
-        SERVICE_ONE_ID,
-        active=False,
-        reply_to_email_id=fake_uuid,
-    )
+    mock_delete.assert_called_once_with(service_id=SERVICE_ONE_ID, reply_to_email_id=fake_uuid)
 
 
 @pytest.mark.parametrize('fixture, data, api_default_args', [
@@ -1435,9 +1430,9 @@ def test_delete_sms_sender(
     service_one,
     fake_uuid,
     get_non_default_sms_sender,
-    mock_update_sms_sender,
+    mocker,
 ):
-
+    mock_delete = mocker.patch('app.service_api_client.delete_sms_sender')
     client_request.post(
         '.service_delete_sms_sender',
         service_id=SERVICE_ONE_ID,
@@ -1448,12 +1443,7 @@ def test_delete_sms_sender(
             _external=True,
         )
     )
-
-    mock_update_sms_sender.assert_called_once_with(
-        SERVICE_ONE_ID,
-        active=False,
-        sms_sender_id='1234',
-    )
+    mock_delete.assert_called_once_with(service_id=SERVICE_ONE_ID, sms_sender_id='1234')
 
 
 @pytest.mark.parametrize('fixture, hide_textbox, fixture_sender_id', [
diff --git a/tests/app/notify_client/test_service_api_client.py b/tests/app/notify_client/test_service_api_client.py
index bf7a312ed..314bec542 100644
--- a/tests/app/notify_client/test_service_api_client.py
+++ b/tests/app/notify_client/test_service_api_client.py
@@ -344,10 +344,12 @@ def test_returns_value_from_cache(
     (service_api_client, 'update_service_inbound_api', [SERVICE_ONE_ID] + [''] * 4, {}),
     (service_api_client, 'add_reply_to_email_address', [SERVICE_ONE_ID, ''], {}),
     (service_api_client, 'update_reply_to_email_address', [SERVICE_ONE_ID] + [''] * 2, {}),
+    (service_api_client, 'delete_reply_to_email_address', [SERVICE_ONE_ID, ''], {}),
     (service_api_client, 'add_letter_contact', [SERVICE_ONE_ID, ''], {}),
     (service_api_client, 'update_letter_contact', [SERVICE_ONE_ID] + [''] * 2, {}),
     (service_api_client, 'add_sms_sender', [SERVICE_ONE_ID, ''], {}),
     (service_api_client, 'update_sms_sender', [SERVICE_ONE_ID] + [''] * 2, {}),
+    (service_api_client, 'delete_sms_sender', [SERVICE_ONE_ID, ''], {}),
     (service_api_client, 'update_service_callback_api', [SERVICE_ONE_ID] + [''] * 4, {}),
     (service_api_client, 'create_service_callback_api', [SERVICE_ONE_ID] + [''] * 3, {}),
     (user_api_client, 'add_user_to_service', [SERVICE_ONE_ID, fake_uuid(), []], {}),