Connection Error SMTP python

Try using SMTP’s empty constructor, then call connect(host, port):

    server = smtplib.SMTP()
    server.connect('smtp.gmail.com', '587')
    server.ehlo()
    server.starttls()
    server.login(username, password)

You have an ehlo after close. That seems unlikely to ever succeed. Also, quit does close so you can probably just get rid of the ehlo and close calls near the end

You can still have an encrypted connection with the smtp server by using the SMTP_SSL class without needing the starttls call (shorter). You don’t need to be calling the ehlo every time, that’s done automatically when needed, and when connecting to the default port, don’t have to supply one when creating instances SMTP* classes.

msg = MIMEText ('%s - %s' % (msg.text, msg.channel))
msg['To'] = ','.join(receivers)
msg['Subject'] = 'msg.channel'
msg['From'] = '[email protected]'

Using SMTP with the starttls:

server = smtplib.SMTP('smtp.gmail.com')
server.starttls()
server.login('user', 'password')
server.sendmail(msg['From'], receivers, msg.as_string())

and now with the SMTP_SSL class

server = smtplib.SMTP_SSL('smtp.gmail.com')
server.login('user', 'password')
server.sendmail(msg['From'], receivers, msg.as_string())

and finally

server.quit()

I’m the maintainer of yagmail, a package that should make it really easy to send an email.

import yagmail
yag = yagmail.SMTP('user','password')
yag.send(to = '[email protected]', subject = 'msg.channel')

when yag leaves scope, it will auto-close.

I would also advise you to register in keyring once, so you’ll never have to write the password in a script. Just run once:

yagmail.register('user', 'password')

You can then shorten it to this:

SMTP().send('[email protected]', 'msg.channel')

You can install it with pip or pip3 (for Python 3). You can also read more about it, with functionality as easily adding attachments, inline images/html, aliases etc.

For Pyhton 3.6.*
Note : In gmail it will work only if 2-Step verification is turned off.
Allow gmail to open via low secured app.

import smtplib
from email.mime.multipart import MIMEMultipart
from email.mime.text import MIMEText

from_addr = 'sender-email-id'
to_addr = 'receiver-email-id'
text = 'Hi Friend!!!'

username = 'sender-username'
password = 'password'

msg = MIMEMultipart()

msg['From'] = from_addr
msg['To'] = to_addr
msg['Subject'] = 'Test Mail'
msg.attach(MIMEText(text))


server = smtplib.SMTP('smtp.gmail.com:587')
server.ehlo()
server.starttls()
server.ehlo()
server.login(username,password)
server.sendmail(from_addr,to_addr,msg.as_string())
server.quit()

I had a similar problem when I tried to send an e-mail from Celery (as a Docker container). I added env_file to the worker and beat containers in a docker compose file.

env_file: ./env/dev/.env

In that file I have an e-mail configuration.

EMAIL_HOST=smtp.gmail.com
EMAIL_HOST_USER=your_mail
EMAIL_HOST_PASSWORD=your_password
EMAIL_PORT=587

I solved this error just by removing this line:

server.quit() 

raise SMTPServerDisconnected(‘please run connect() first’)

if you had this error you my be want install this :

pip install django-smtp-ssl

this one to install smtp library and ssl protocol

its work perfecly for me

Believe me or not solution is very simple….

Simply just don’t close the connection our in other words don’t quit the server.

remove "server.quit()".

now you’ll be able to send as many mails you need to.