GAE/Pのbackground_thread.BackgroundThreadがFrontendsNotSupportedというエラーで動かない ref: http://qiita.com/puriketu99/items/afc7426c51273ca794f4

file0.txt

from threading import Thread
from django.core.mail import send_mail

subject = 'Hello!'
msg = '\n \n Hello World!'
sender = settings.DEFAULT_FROM_EMAIL
to = 'x...@xx.com

t = Thread(target=send_mail, args=[subject, msg, sender, to], kwargs={'fail_silently': False})
t.setDaemon(True)
t.start()