javax.mail.AuthenticationFailedException: 535-5.7.8 Username and Password not accepted

Question

I am getting this error when I try to send mail using the JavaMail API:

javax.mail.AuthenticationFailedException: 535-5.7.8 Username and Password not accept         


        

Answer 1

This worked for me:

1. Login to the gmail account you are sending mail from
2. Go to Manage your Google Account -> Security -> Less secure app access -> Turn on access (not recommended)
   or
   Access the URL:
   https://www.google.com/settings/security/lesssecureapps
3. Turn "Allow less secure apps: OFF" to "Allow less secure apps: ON"