Block or sanitize emojis on e-mail subjects

I think this is another vector in potential - certainly already being very abusee.

AFAIK, emojis on subjects can download external data unrestrained.

As an example I could cite Outlook app on MacOS: even if you disable automatic image loading on e-mails, emojis on subject of the messages are show anyway. This is also true for Gmail service. At least through the web browser.

OFC I have already dropped a sugestion to Microsoft to extend their feature, but a wider solution - if possible, would be really appreciated.