This year I've started receiving spam emails which are very easily identified by containing emoji symbols in the subject title. I tried filtering them one by one, but the spammers just keep using new ones, so I'm having to constantly add more filters of a single emoji symbol. Is there a way to add all emojis to the filter, existing and planned? Or can I whitelist only alphanumeric characters and characters of certain languages I expect to receive emails in, to achieve basically the same result?

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