Connection could not be established with host smtp.zoho.com [Connection refused #111]'

Connection could not be established with host smtp.zoho.com [Connection refused #111]'

Hi

we moved our site to a new hosting and a script which sends email from our contact form is getting the above error now.

I checked with the hosting company, nothing should be blocked from there end.

The site is on public IP 92.48.206.137