小编Jul*_*ian的帖子

我正在尝试使用 Flask-Mail 发送电子邮件。我与收件人一起创建了消息，但是AssertionError: No recipients have been added当我尝试发送它时我收到了。在下面的代码中，我打印出消息收件人，它们是正确的。我该如何解决这个错误？

from flask import Flask
from flask_mail import Message, Mail

app = Flask(__name__)
app.config.update(
    DEBUG=True,
    MAIL_SERVER='smtp.gmail.com',
    MAIL_PORT=465,
    MAIL_USE_SSL=True,
    MAIL_USERNAME='socialcreditsystem@gmail.com',
    MAIL_PASSWORD='mypassword'
)
mail = Mail(app)

@app.route('/')
def hello_world():
    msg=Message('hey hey hey', sender='socialcreditsystem@gmail.com', recipients=['julian.fink1000@gmail.com'])
    print(msg.sender, msg.recipients)
    # ('socialcreditsystem@googlemail.com', ['julian.fink1000@googlemail.com'])
    print(msg.send_to)
    # set(['julian.fink1000@googlemail.com'])
    mail.send_message(msg)
    return 'Hello World!'

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

Traceback (most recent call last):
  File "C:\Python27\lib\site-packages\flask\app.py", line 1836, in __call__
    return self.wsgi_app(environ, start_response)
  File "C:\Python27\lib\site-packages\flask\app.py", line 1820, in wsgi_app
    response = …