SMTPAuthenticationError when sending mail using gmail and python [duplicate]

Question

when i try to send mail using gmail and python error occurred this type of question are already in this site but doesn't help to me

gmail_user = "[email protected]"
gmail_pwd = "password"
TO = '[email protected]'
SUBJECT = "Testing sending using gmail"
TEXT = "Testing sending mail using gmail servers"
server = smtplib.SMTP('smtp.gmail.com', 587)
server.ehlo()
server.starttls()
server.login(gmail_user, gmail_pwd)
BODY = '\r\n'.join(['To: %s' % TO,
        'From: %s' % gmail_user,
        'Subject: %s' % SUBJECT,
        '', TEXT])

server.sendmail(gmail_user, [TO], BODY)
print ('email sent')

error:

    server.login(gmail_user, gmail_pwd)
    File "/usr/lib/python3.4/smtplib.py", line 639, in login
   raise SMTPAuthenticationError(code, resp)
   smtplib.SMTPAuthenticationError: (534, b'5.7.14   
   <https://accounts.google.com/ContinueSignIn?sarp=1&scc=1&plt=AKgnsbtl1\n5.7.14       Li2yir27TqbRfvc02CzPqZoCqope_OQbulDzFqL-msIfsxObCTQ7TpWnbxIoAaQoPuL9ge\n5.7.14 BUgbiOqhTEPqJfb02d_L6rrdduHSxv26s_Ztg_JYYavkrqgs85IT1xZYwtbWIRE8OIvQKf\n5.7.14 xxtT7ENlZTS0Xyqnc1u4_MOrBVW8pgyNyeEgKKnKNyxce76JrsdnE1JgSQzr3pr47bL-kC\n5.7.14 XifnWXg> Please log in via your web browser and then try again.\n5.7.14 Learn more at\n5.7.14 https://support.google.com/mail/bin/answer.py?answer=78754 fl15sm17237099pdb.92 - gsmtp')

Look like I can't add a new answer to this question, none of the below worked for me. After contacting google this was the solution stackoverflow.com/a/56809076/1225755 — Ryan King
– Ryan King, Commented Jun 28, 2019 at 14:56

aaveg · Accepted Answer · 2015-11-04 22:43:11Z

147

Your code looks correct. Try logging in through your browser and if you are able to access your account come back and try your code again. Just make sure that you have typed your username and password correct

EDIT: Google blocks sign-in attempts from apps which do not use modern security standards (mentioned on their support page). You can however, turn on/off this safety feature by going to the link below:

Go to this link and select Turn On
https://www.google.com/settings/security/lesssecureapps

edited Nov 4, 2015 at 22:43

answered Nov 10, 2014 at 20:52

aaveg

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14 Comments

Kehlin Swain Over a year ago

Make sure you click turn on, and not turn off! I lost two hours of time because of this simple error :)

psychok7 Over a year ago

@AnantGupta Note to Google Apps users: This setting is hidden if your administrator has locked less secure app account access. you have to enable this in the admin console first and after a while you will be abler to allow lesssecureapps

muyong Over a year ago

Turn on this solve the prob. Thanks. But is there any change in the code to make it securer so google can accept?

anonymous Over a year ago

@aaveg Is there a way to check in the Python console whether it is invalid credentials or a need to enable less secure apps?

Aman Sharma Over a year ago

Google has deprecated this feature from 30th May, 2022

|

Hamish · Accepted Answer · 2020-09-12 12:23:49Z

51

Your code looks correct but sometimes google blocks an IP when you try to send a email from an unusual location. You can try to unblock it by visiting https://accounts.google.com/DisplayUnlockCaptcha from the IP and following the prompts.

Reference: https://support.google.com/accounts/answer/6009563

edited Sep 12, 2020 at 12:23

Hamish

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answered Mar 18, 2015 at 14:51

taz

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7 Comments

abarisone Over a year ago

Please describe some points of the solution, since the link is valid now but could be unreachable later

Anupam Over a year ago

If it helps anyone else, I got auth error even after turning on less secure apps and displayunlockcaptcha. After a while of figuring out, I saw that less secure apps settings in google was turning off on its own! I tried turning it on a couple of times and it worked then.

Nilesh Over a year ago

When you turn on this feature, generally, it reflects in an hour but sometimes it takes 24 hrs to get reflected. Its mentioned in their console.

hsc Over a year ago

Thanks, I try to run my script on my vps(a ip I never logged in with before) and this link works for me to sign in on new ip.

Bicheng Over a year ago

Even after I turned on lesssecureapps, it still complained error. Your sulution comes my rescue, thanks very much.

|

Pablo · Accepted Answer · 2014-11-10 21:46:31Z

4

I have just sent an email with gmail through Python. Try to use smtplib.SMTP_SSL to make the connection. Also, you may try to change the gmail domain and port.

So, you may get a chance with:

server = smtplib.SMTP_SSL('smtp.googlemail.com', 465)
server.login(gmail_user, password)
server.sendmail(gmail_user, TO, BODY)

As a plus, you could check the email builtin module. In this way, you can improve the readability of you your code and handle emails headers easily.

answered Nov 10, 2014 at 21:46

Pablo

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3 Comments

SmallChess Over a year ago

This failed to solve the problem.

Pablo Over a year ago

@SmallChess this is a pretty old answer. Certainly google already change its auth method and maybe Python already has something done to deal with it. Check aaveg answer which looks to work.

Davide Over a year ago

2020 and works very well. As server you could also use smtp.gmail.com

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