Quarantine - learning from delivered mail?

Quarantine - learning from delivered mail?

I have recently manually delivered numerous emails from a specific domain and I would expect that Zoho mail would learn from this and automatically whitelist this domain for my account in the future (or perhaps even better for everyone?).

However email from this domain is still being quarantined so I have now manually added the domain to my trusted domain list.

I would have expected not to have to do this manually, does Zoho spam filtering not have even basic learning functionality?