python - Flask Web开发，用户注册完需要邮箱确认问题

我在自学Flask，在看《FlaskWeb开发：基于Python的Web应用开发实战》这本书，目前已经做到了用户注册这一块，卡在了用户注册完需要邮箱确认才可以更完整的编辑信息，是不是用Venv模拟环境下是不能发送邮件的？这一点很迷惑，希望有前辈能指点一下。

界面图片如下：

代码是从官方github克隆的。

from ..email import send_email
@auth.route('/register', methods = ['GET', 'POST'])
def register():
form = RegistrationForm()
if form.validate_on_submit():
# ...
db.session.add(user)
db.session.commit()
token = user.generate_confirmation_token()
send_email(user.email, 'Confirm Your Account',
'auth/email/confirm', user=user, token=token)
flash('A confirmation email has been sent to you by email.')
return redirect(url_for('main.index'))
return render_template('auth/register.html', form=form)

报错

send: 'ehlo [192.168.0.66]\r\n'
reply: '250-smtp.googlemail.com at your service, [119.130.184.228]\r\n'
reply: '250-SIZE 35882577\r\n'
reply: '250-8BITMIME\r\n'
reply: '250-STARTTLS\r\n'
reply: '250-ENHANCEDSTATUSCODES\r\n'
reply: '250-PIPELINING\r\n'
reply: '250-CHUNKING\r\n'
reply: '250 SMTPUTF8\r\n'
reply: retcode (250); Msg: smtp.googlemail.com at your service, [119.130.184.228
]
SIZE 35882577
8BITMIME
STARTTLS
ENHANCEDSTATUSCODES
PIPELINING
CHUNKING
SMTPUTF8
send: 'STARTTLS\r\n'
reply: '220 2.0.0 Ready to start TLS\r\n'
reply: retcode (220); Msg: 2.0.0 Ready to start TLS
send: 'ehlo [192.168.0.66]\r\n'
reply: '250-smtp.googlemail.com at your service, [119.130.184.228]\r\n'
reply: '250-SIZE 35882577\r\n'
reply: '250-8BITMIME\r\n'
reply: '250-AUTH LOGIN PLAIN XOAUTH2 PLAIN-CLIENTTOKEN OAUTHBEARER XOAUTH\r\n'
reply: '250-ENHANCEDSTATUSCODES\r\n'
reply: '250-PIPELINING\r\n'
reply: '250-CHUNKING\r\n'
reply: '250 SMTPUTF8\r\n'
reply: retcode (250); Msg: smtp.googlemail.com at your service, [119.130.184.228
]
SIZE 35882577
8BITMIME
AUTH LOGIN PLAIN XOAUTH2 PLAIN-CLIENTTOKEN OAUTHBEARER XOAUTH
ENHANCEDSTATUSCODES
PIPELINING
CHUNKING
SMTPUTF8
send: 'mail FROM: size=1748\r\n'
reply: '530-5.5.1 Authentication Required. Learn more at\r\n'
reply: '530 5.5.1  https://support.google.com/mail/answer/14257 eh9sm8453423pad.
47 - gsmtp\r\n'
reply: retcode (530); Msg: 5.5.1 Authentication Required. Learn more at
5.5.1  https://support.google.com/mail/answer/14257 eh9sm8453423pad.47 - gsmtp
send: 'rset\r\n'
reply: '250 2.1.5 Flushed eh9sm8453423pad.47 - gsmtp\r\n'
reply: retcode (250); Msg: 2.1.5 Flushed eh9sm8453423pad.47 - gsmtp
send: 'quit\r\n'
reply: '221 2.0.0 closing connection eh9sm8453423pad.47 - gsmtp\r\n'
reply: retcode (221); Msg: 2.0.0 closing connection eh9sm8453423pad.47 - gsmtp
Exception in thread Thread-3:
Traceback (most recent call last):
  File "c:\python27\Lib\threading.py", line 801, in __bootstrap_inner
    self.run()
  File "c:\python27\Lib\threading.py", line 754, in run
    self.__target(*self.__args, **self.__kwargs)
  File "C:\Users\Administrator\myproject\flasky\app\email.py", line 9, in send_a
sync_email
    mail.send(msg)
  File "C:\Users\Administrator\myproject\venv\lib\site-packages\flask_mail.py",
line 416, in send
    message.send(connection)
  File "C:\Users\Administrator\myproject\venv\lib\site-packages\flask_mail.py",
line 351, in send
    connection.send(self)
  File "C:\Users\Administrator\myproject\venv\lib\site-packages\flask_mail.py",
line 168, in send
    message.as_string())
  File "c:\python27\Lib\smtplib.py", line 731, in sendmail
    raise SMTPSenderRefused(code, resp, from_addr)
SMTPSenderRefused: (530, '5.5.1 Authentication Required. Learn more at\n5.5.1  h
ttps://support.google.com/mail/answer/14257 eh9sm8453423pad.47 - gsmtp', 'Flasky
 Admin ')