email.py

from flask import Flask
from flask_mail import Mail, Message
import os
app = Flask(__name__)
app.app_context().push()
app.config['MAIL_SERVER'] = 'smtp.googlemail.com'
app.config['MAIL_USE_TLS'] = True
app.config['MAIL_PORT'] = 587
app.config['MAIL_USERNAME'] = os.environ.get('EMAIL')
app.config['MAIL_PASSWORD'] = os.environ.get('PASS')

mail = Mail(app)

to = ['man**********@gmail.com']
msg_body = "This is a mail sent from flask app. Do not reply to this message. Have a nice day!"
sub = "Test email for password reset"

msg = Message(subject=sub,recipients=to,body=msg_body,sender='noreply@gmail.com')

mail.send(msg)

if __name__ == "__main__":
    app.run()