Using Flask-Mail asynchronously results in “RuntimeError: working outside of application context”

Question

I am trying to send some mail asynchronously (based on the code in The Flask Mega-Tutorial, Part XI: Email Support). However, I get the following error about working outsid

Answer 1

The code should run in an app context. Add with app.app_context():

 @async
 def send_async_email(msg):
    with app.app_context():
       mail.send(msg)