Google image search for setting sender's icon

Google image search for setting sender's icon

We now have two letter abbreviations for senders in Zoho Mail (like an icon), which is good.  It'd be great to take it a step further and allow us to set the icons we want instead. 

Concrete example: I receive automated messages from my son's nursery with updates from the class.  These emails are from "BH" now, which is OK, but I'd rather see the nursery's logo.  Keep in mind I don't want to create a Contact, b/c these are from an automated email address.

Ideally, I'd like to do a google image search right from the email message to set the sender's icon.