Example of using Flask-Mail with Gmail

mail.py

# This code works for me :)

from flask import Flask
from flask_mail import Mail, Message

app = Flask(__name__)

app.config.update(dict(
    DEBUG=True,
    MAIL_SERVER='smtp.gmail.com',
    MAIL_PORT=587,
    MAIL_USE_TLS=True,
    MAIL_USE_SSL=False,
    MAIL_USERNAME='post.ethan@gmail.com',
    # Use google account to generate a custom password here. This is not your "normal" pass.
    MAIL_PASSWORD='fhrkfhrfhrkfhkrhfkr',
))

mail = Mail(app)

m = Message("Hello", sender="post.ethan@gmail.com", recipients=["post.ethan@gmail.com"])

m.body = "Testing"
m.html = "<i>Testing</i>"


def send_email(mail_message):
    with app.app_context():
        mail.send(mail_message)


send_email(m)