Flask-Mail - Sending email asynchronously, based on Flask-Cookiecutter

Question

My flask project is based on Flask-Cookiecutter and I need to send emails asynchronously.

Function for sending email was configured by Miguel’s Tutorial and sending sync

Answer 1

Move email send function to a background thread:

from threading import Thread

def send_async_email(app,msg):
       with current_app.app_context():
               mail.send(msg)

def send_email(to, subject, template, **kwargs):
       msg = Message(subject, recipients=[to])
       msg.html = render_template('emails/' + template, **kwargs)
       thr = Thread(target=send_async_email,args=[app,msg])
       thr.start()
       return thr