flask mail发送不出消息(smtp填写的是qq第三份授权码）

Question

import os
from datetime import datetime
from flask.ext.moment import Moment
from flask.ext.script import Manager
from flask import Flask,render_template,session,redirect,url_for,flash
from flask.ext.bootstrap import Bootstrap
from flask.ext.wtf import Form
from wtforms import StringField,SubmitField
from wtforms.validators import Required
from flask.ext.sqlalchemy import SQLAlchemy
from flask.ext.script import Shell
from flask.ext.migrate import Migrate,MigrateCommand
from flask.ext.mail import Mail
from flask.ext.mail import Message

basedir = os.path.abspath(os.path.dirname(__file__))

app=Flask(__name__)
app.config['SQLALCHEMY_DATABASE_URI']=\
    'sqlite:///'+os.path.join(basedir,'data.sqlite')
app.config['SQLALCHEMY_COMMIT_ON_TEARDOWN']=True
app.config['SECRET_KEY']='hard to guess string'

app.config['MAIL_SERVER']='smtp.qq.com'
app.config['MAIL_PORT']=587
app.config['MAIL_USE_TLS']=True
app.config['MAIL_USERNAME']=os.environ.get('MAIL_USERNAME')#‘####@qq.com’ 
app.config['MAIL_PASSWORD']= os.environ.get('MAIL_PASSWORD')‘#vmnjaqiwvofcbgbi’
app.config['FLASKY_MAIL_SUBJECT_PREFIX']='[FLASKY]'
app.config['FLASKY_MAIL_SENDER']='Flasky Admin ###@qq.com'
app.config['FLASKY_ADMIN']=os.environ.get['FLASKY_ADMIN']


moment=Moment(app)
manager=Manager(app)
bootstrap=Bootstrap(app)
db=SQLAlchemy(app)
mail=Mail(app)

migrate=Migrate(app,db)
manager.add_command('db',MigrateCommand)

class Role(db.Model):
    __tablename__='roles'
    id=db.Column(db.Integer,primary_key=True)
    name=db.Column(db.String(64),unique=True)
    users=db.relationship('User',backref='role',lazy='dynamic')

    def __repr__(self):
        return '<Role %r>'%self.name
class User(db.Model):
    __tablename__='users'
    id=db.Column(db.Integer,primary_key=True)
    username=db.Column(db.String(64),unique=True,index=True)
    role_id=db.Column(db.Integer,db.ForeignKey('roles.id'))

    def __repr__(self):
        return '<User %r>'%self.username


class NameForm(Form):
    name=StringField('What is your name?',validators=[Required()])
    submit=SubmitField('Submit')

def send_email(to,subject,template,**kwargs):
    msg=Message(app.config['FLASKY_MAIL_SUBJECT_PREFIX']+subject,
                sender=app.config['FLASKY_MAIL_SENDER'],recipients=[to])
    msg.body=render_template(template+'.txt',**kwargs)
    msg.html=render_template(template+'.html',**kwargs)
    mail.send(msg)

@app.route('/',methods=['GET','POST'])
def index():
    form=NameForm()
    if form.validate_on_submit():
        user=User.query.filter_by(username=form.name.data).first()
        if user is None:
            user=User(username=form.name.data)
            db.session.add(user)
            session['known']=False
            if app.config['FLASKY_ADMIN']:
                send_email(app.config['FLASKY_ADMIN'], 'New User', 
                          'mail/new_user', user=user)
        else:
            session['known']=True
        session['name']=form.name.data
        form.name.data=''
        return redirect(url_for('index'))
    return render_template('index.html',form=form,name=session.get('name'),
                           known=session.get('known',False))

def make_shell_context():
    return dict(app=app,db=db,User=User,Role=Role)
manager.add_command("shell",Shell(make_context=make_shell_context))

@app.errorhandler(404)
def page_not_found(e):
    return render_template('404.html'),404

@app.errorhandler(500)
def internal_server_error(e):
    return render_template('500.html'),500

if __name__=='__main__':
    manager.run()

然后输入export FLASKY_ADMIN=505082548@qq .com

没有显示出发送邮件