Unknown SMTP host: smtp.google.com ;java.net.UnknownHostException: smtp.google.com

Unknown SMTP host: smtp.google.com ;java.net.UnknownHostException: smtp.google.com

I am unable to send emails via Zoho. The message is unknown smpt host. It is required so I would really appreciate assistance. Thank You!

Ps, I have already closed the software and reopened it, multiple ways.