flask_mail, mails are stuck on thread and never send

Question

I'm using flask + socketio with ssl, and I'm trying to send mail, but for some reason, sending mail is not working.

Here is my configuration:

app.config['MAIL_SERVER']='smtp.gmail.com'
app.config['MAIL_PORT'] = 465
app.config['MAIL_USERNAME'] = '[email protected]'
app.config['MAIL_PASSWORD'] = 'xxx;'
app.config['MAIL_USE_TLS'] = False
app.config['MAIL_USE_SSL'] = True
app.config['DEBUG'] = True

mail=Mail(app)

...

And when I'm using it:

@app.route('/testMail')
def testMail():
    msg = Message(
              'Hello',
           sender='[email protected]',
           recipients=['[email protected]'])
    msg.body = "This is the email body"
    mail.send(msg)

    return ""

And here is the error log:

File "/usr/local/Cellar/python/2.7.11/Frameworks/Python.framework/Versions/2.7/lib/python2.7/socket.py", line 307, in flush self._sock.sendall(view[write_offset:write_offset+buffer_size]) File "/usr/local/Cellar/python/2.7.11/Frameworks/Python.framework/Versions/2.7/lib/python2.7/ssl.py", line 721, in sendall v = self.send(data[count:]) File "/usr/local/Cellar/python/2.7.11/Frameworks/Python.framework/Versions/2.7/lib/python2.7/ssl.py", line 687, in send v = self._sslobj.write(data) error: [Errno 32] Broken pipe

...

File "/usr/local/lib/python2.7/site-packages/flask_mail.py", line 156, in configure_host host = smtplib.SMTP_SSL(self.mail.server, self.mail.port) File "/usr/local/Cellar/python/2.7.11/Frameworks/Python.framework/Versions/2.7/lib/python2.7/smtplib.py", line 796, in init SMTP.init(self, host, port, local_hostname, timeout) File "/usr/local/Cellar/python/2.7.11/Frameworks/Python.framework/Versions/2.7/lib/python2.7/smtplib.py", line 256, in init (code, msg) = self.connect(host, port) File "/usr/local/Cellar/python/2.7.11/Frameworks/Python.framework/Versions/2.7/lib/python2.7/smtplib.py", line 316, in connect self.sock = self._get_socket(host, port, self.timeout) File "/usr/local/Cellar/python/2.7.11/Frameworks/Python.framework/Versions/2.7/lib/python2.7/smtplib.py", line 801, in _get_socket new_socket = socket.create_connection((host, port), timeout) File "/usr/local/Cellar/python/2.7.11/Frameworks/Python.framework/Versions/2.7/lib/python2.7/socket.py", line 575, in create_connection raise err error: [Errno 65] No route to host

For some reason, I can't send any email. It seems stuck because of the socketio + ssl wrapping. I've got no idea on how to configure the right way.

There is No route to host in the error log. Check the network connection to the server and port from your program. It may be prohibited by a firewall. — VPfB

julian salas julian salas · Accepted Answer · 2016-07-12T16:28:56

I had the same issue, if your are working in a virtual machine check the network connection for the ssh port, in my case i work with vagrant, I enabled connection for the ssh port, this code works to me:

from flask import Flask
from flask_mail import Mail, Message

# object Flask and object Mail

app = Flask(__name__)
#configuration flask to Mail
app.config.update(
             MAIL_SERVER = "smtp.gmail.com",
             MAIL_PORT = 465,
             MAIL_USERNAME = '[email protected]',  #user mail
             MAIL_PASSWORD = 'xxx',
             MAIL_USE_TLS = False,
             MAIL_USE_SSL = True,
             MAIL_DEFAULT_SENDER  =  '[email protected]', #user that will go email)
mail = Mail(app)

@app.route("/index")
def index():
    return "ok"


@app.route("/Test Mail")
def test_mail():
    """route to test email by flask mail."""
    msj = "This is a test to send mail with flask."
    recipients = ["[email protected]"]
    msg_object = Message("hello", recipients)
    msg_object.body = "Hello, this email is a test"
    mail.send(msg_object)
    return "Sent"



if __name__ == '__main__':
    app.run(host="0.0.0.0", port=7000, debug=True)

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flask_mail, mails are stuck on thread and never send

1 Answers