SMTP not working from Joomla

SMTP not working from Joomla

I entered in joomla server config, all SMTP params for zoho:

from address: office@[domain-registered-with-zoho],
SSL, 465
smtp.zoho.com
username: myusername in form of office@[same as above]
pass: valid pass

Still, we are not receving mail sent through our site contact form. What could be the problem?