Python 邮件：OSError:[Errno 2]没有这样的文件或目录

OSError:[Errno 2]当我尝试使用电子邮件发送邮件时，没有这样的文件或目录。 下面是我的代码：

       app.config['MAIL_SERVER']='smtp.gmail.com'
       app.config['MAIL_PORT'] = 465
       app.config['MAIL_USERNAME'] = parametter.email_sender
       app.config['MAIL_PASSWORD'] = parametter.email_sender_password
       app.config['MAIL_USE_TLS'] = False
       app.config['MAIL_USE_SSL'] = False
       mail = Mail(app)
      @app.route('/')
      def main():
               msg = Message('Hello', sender = parametter.email_sender,recipients = [parametter.email_recipients])
               msg.body = "Hello Flask message sent from Flask-Mail"
               mail.send(msg)
               return "Sent"

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当我注释（#mail.send（msg））时，程序正常运行。但是我不能发送消息。有人能帮我回答这个问题吗？

导入库时出错：

from flask.ext.mail import Mail, Message

应该是：

from flask_mail import Mail, Message