Flask-mail sends detailed steps and errors

This week, I have a little spare time to continue to learn flask web, among which flask-mail is the biggest pit! I will pull everyone out of the pit step by step!

1. First, change the mailbox to 163

app.config['MAIL_SERVER'] = 'smtp.163.com'
app.config['MAIL_PORT'] = 465
app.config['MAIL_USE_SSL'] = True

2. Setting environment variables

set [email protected]
set MAIL_PASSWORD=xxxx

Yes, I don't know where, I have been pitted for two days!

At the beginning, I set it in PyCharm's Terminal, no way! !

Later, I set it under the cmd command again, but every time I restart it doesn't work anymore, huh, huh!

Finally, in my computer - right click - properties - advanced system settings - environment variables, set MAIL_USERNAME, etc.

3. Set 163 mailboxes POP3/SMTP/IMAP, if not set, there will be the following errors:

File "D:\PycharmProjects\hello\venv\lib\site-packages\flask_mail.py", line 165, in configure_host
    host.login(self.mail.username, self.mail.password)
File "E:\Python36\Lib\smtplib.py", line 730, in login
    raise last_exception
File "E:\Python36\Lib\smtplib.py", line 721, in login
    initial_response_ok=initial_response_ok)
File "E:\Python36\Lib\smtplib.py", line 642, in auth
    raise SMTPAuthenticationError(code, resp)
smtplib.SMTPAuthenticationError: (550, b'User has no permission')

4. Create a new mail folder under the templates folder in the project, create a new_user.html, and the content is

User <b>{{ user.username }}</b> has joined.

5. Finally, the code of the previous part of hello.py

app.config['MAIL_USERNAME'] = os.environ.get('MAIL_USERNAME')
app.config['MAIL_PASSWORD'] = os.environ.get('MAIL_PASSWORD')
app.config['FLASKY_MAIL_SUBJECT_PREFIX'] = '[Flasky]'
app.config['FLASKY_MAIL_SENDER'] ='Flasky Admin <[email protected]>'
app.config['FLASKY_ADMIN'] = os.environ.get('FLASKY_ADMIN')

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():
        # old_name = session.get('name')
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 = ''
# send_email(app.config['FLASKY_ADMIN'], 'New User')
        # send_email(app.config['FLASKY_ADMIN'], 'New User', 'mail/new_user', user=user)
return redirect(url_for('index'))
    return render_template('index.html', form=form, name=session.get('name'), known=session.get('known', False))

if __name__ == '__main__':
    app.run(debug=True)
    # manager.run()

运行，发送成功！

Flask-mail sends detailed steps and errors

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