So I built a flask app and it worked great when I ran it locally. Then I pushed it to my AWS EC2 instance. Once I was running it from my instance it was no longer sending emails. It would add to my database then the next line was to send the email. That is where it was failing. It was that Google was blocking the device. I then was able to allow that device and it was all working fine.
Fast forward and I added an elastic IP and then linked it to my domain and now it is not working again. It is still adding to my database so I think that it is the issue is google is not letting the application work. I am not sure how to solve this but I have been working on this for some time. This is the error code that I get on my instance
Traceback (most recent call last):
File "/usr/local/lib/python2.7/site-packages/flask/app.py", line 2292, in wsgi_app
response = self.full_dispatch_request()
File "/usr/local/lib/python2.7/site-packages/flask/app.py", line 1815, in full_dispatch_request
rv = self.handle_user_exception(e)
File "/usr/local/lib/python2.7/site-packages/flask/app.py", line 1718, in handle_user_exception
reraise(exc_type, exc_value, tb)
File "/usr/local/lib/python2.7/site-packages/flask/app.py", line 1813, in full_dispatch_request
rv = self.dispatch_request()
File "/usr/local/lib/python2.7/site-packages/flask/app.py", line 1799, in dispatch_request
return self.view_functions[rule.endpoint](**req.view_args)
File "FlaskApp.py", line 130, in register
mail.send(msg)
File "/usr/local/lib/python2.7/site-packages/flask_mail.py", line 492, in send
message.send(connection)
File "/usr/local/lib/python2.7/site-packages/flask_mail.py", line 427, in send
connection.send(self)
File "/usr/local/lib/python2.7/site-packages/flask_mail.py", line 178, in send
"The message does not specify a sender and a default sender "
AssertionError: The message does not specify a sender and a default sender has not been configured
And on my website I get the tab that says "500 Internal Server Error" and the website displays the following.
Internal Server Error
The server encountered an internal error and was unable to complete your request. Either the server is overloaded or there is an error in the application.
Can someone help me figure this out. I would like to be able to send emails again using my flask app. I am new to this so my logic says that it is all because I am being denyed access to the google account. But I cannot find a link or anything that will enable me to allow access for the EC2 instance. I even have tried to use this: https://accounts.google.com/DisplayUnlockCaptcha but that doesn't work either.
UPDATE: It was working before and I did not change anything in my source code, see below:
FROM_EMAIL = os.environ.get('EMAIL_USERNAME')
app.config.update(
DEBUG = False,
MAIL_SERVER = 'smtp.gmail.com',
MAIL_PORT = 465,
MAIL_USE_SSL = True,
MAIL_USERNAME = FROM_EMAIL,
MAIL_PASSWORD = os.environ.get('EMAIL_PASSWORD_TOKEN'),
)
mail = Mail(app)
and then when I call is I use:
msg = Message("Welcome",
sender = FROM_EMAIL,
recipients = [request.form["email"]])
msg.body = "Welcome! \n\n Congratulations on your sucessful registration."
mail.send(msg)
UPDATE #2: I am not sure why but I had to add a default sender and that worked but I am still unable to send emails. I now get the following error:
[2019-01-22 01:40:44,973] ERROR in app: Exception on /register/ [POST]
Traceback (most recent call last):
File "/usr/local/lib/python2.7/site-packages/flask/app.py", line 2292, in wsgi_app
response = self.full_dispatch_request()
File "/usr/local/lib/python2.7/site-packages/flask/app.py", line 1815, in full_dispatch_request
rv = self.handle_user_exception(e)
File "/usr/local/lib/python2.7/site-packages/flask/app.py", line 1718, in handle_user_exception
reraise(exc_type, exc_value, tb)
File "/usr/local/lib/python2.7/site-packages/flask/app.py", line 1813, in full_dispatch_request
rv = self.dispatch_request()
File "/usr/local/lib/python2.7/site-packages/flask/app.py", line 1799, in dispatch_request
return self.view_functions[rule.endpoint](**req.view_args)
File "FlaskApp.py", line 131, in register
mail.send(msg)
File "/usr/local/lib/python2.7/site-packages/flask_mail.py", line 492, in send
message.send(connection)
File "/usr/local/lib/python2.7/site-packages/flask_mail.py", line 427, in send
connection.send(self)
File "/usr/local/lib/python2.7/site-packages/flask_mail.py", line 192, in send
message.rcpt_options)
File "/usr/lib64/python2.7/smtplib.py", line 737, in sendmail
raise SMTPSenderRefused(code, resp, from_addr)
SMTPSenderRefused: (530, '5.5.1 Authentication Required. Learn more at\n5.5.1 https://support.google.com/mail/?p=WantAuthError d21sm19653189pfo.162 - gsmtp', u'myemail@gmail.com')
199.169.1.69 - - [22/Jan/2019 01:40:44] "POST /register/ HTTP/1.1" 500 -
Not sure if it is helpful to know or not but I am able to log into gmail using SMTP cmds from the instance but I still get the error. I followed the directions found here: How to send email using simple SMTP commands via Gmail?
