Well CWP team only help you regarding it.
Well they haven't. I'm still getting threatening emails.
Do you have nginx enabled?
Yes
Does your mail server follow spam policies like adding dkim key and spf record?
rDNS/PTR record check: SUCCESS
Are you trying to upload images on wordpress? OR you are using which script?
It can happen to any of the domains but the most used is Xenforo
You need to set reverse dns from where you purchased server.
I set RDNS at my internet provider as the server is hosted at home on FTTP. Needed additional help from support, but wasn't forthcoming.
Please explain this error little more.
An open Cart database kept failing and had to be repaired a few times. Eventually I tried to migrate the database to wordpress and start the shop fresh, but backup of the database is fine, restore the same database is fine. Start a new database and try and populate it fails. It either does nothing or @custom error.