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Question

I found this error while i\'m trying to send an email from one Gmail account to another. How to solve this error ? Help me on it.

There were an error:

Answer 1

You need to allow less secure apps, you can do it by click below link

https://www.google.com/settings/security/lesssecureapps

also try this one

https://accounts.google.com/DisplayUnlockCaptcha

if still not works try changing password for gmail