I found this error when request forget password in SC 8.1.
You have to change your email settings in the security module, that’s using standard smtp. For gmail you need to use ssl which requires changes. See scriptcase macro documentation.
I have change the setting but still get this error.
That basically means that the username/password is incorrect.
https://www.digitalocean.com/community/tutorials/how-to-use-google-s-smtp-server
You’re right. My password is wrong. Thank you.