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Editorial Team
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Asked: 2026-05-12T12:02:47+00:00

Every few days, google apps starts rejecting my username and password with : SMTPAuthenticationError:

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Every few days, google apps starts rejecting my username and password with :

SMTPAuthenticationError: (535, '5.7.1 Username and Password not accepted. Learn more at\n5.7.1 http://mail.google.com/support/bin/answer.py?answer=14257 22sm439603yxe.15')

If I go to the google apps login page and try my password, it asks for a captcha. Filling it out correctly, now allows me to send email again for a few days until this happens again.

How can I stop this from happening? Has anyone else seen this when sending automated emails through google apps?

I’m sending registration emails from my website using these settings in django :

EMAIL_HOST = 'smtp.gmail.com'
EMAIL_PORT = 587
EMAIL_HOST_USER = 'metaward@metaward.com'
EMAIL_HOST_PASSWORD = '*secret*'
EMAIL_USE_TLS = True
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1 Answer

  1. Editorial Team

    You should throttle your requests to an acceptable rate for Google Apps.

    I am not sure if Google has an official statement/guidance about what is the acceptable request rate, though. If you can’t find any such public statement/guidance, you should contact Google Apps support to see if you can get it through there.

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