废弃 huey，多数据库连接的时候存在 connection 无法释放的问题，回到 celery

account/tasks.py

@@ -0,0 +1,8 @@
+# coding=utf-8
+from celery import shared_task
+from utils.mail import send_email
+
+
+@shared_task
+def _send_email(from_name, to_email, to_name, subject, content):
+    send_email(from_name, to_email, to_name, subject, content)