Send request to api to check if reply-to address is working

app/notify_client/service_api_client.py

@@ -386,6 +386,12 @@ class ServiceAPIClient(NotifyAdminAPIClient):
             )
         )
 
+    def verify_reply_to_email_address(self, email_address):
+        return self.post(
+            "/service/email-reply-to/verify",
+            data={"email": email_address}
+        )
+
     @cache.delete('service-{service_id}')
     def add_reply_to_email_address(self, service_id, email_address, is_default=False):
         return self.post(