I am getting the following error message when sending a email from zoho crm

I am getting the following error message when sending a email from zoho crm

Error while processing the request! Unable to connect SMTP server:smtp.gmail.com Reason:Authentication failed:535-5.7.8 Username and Password not accepted. Learn more at 535 5.7.8 http://support.google.com/mail/bin/answer.py?answer=14257 vd8sm92231514pac.12 - gsmtp


Please help, everything was working fine before. I made a password change for zoho crm and also for google and I am getting this error message since from there. Not sure how to fix it. Please help.