Suppression for "NO EMAIL"

Hi Tessitura Community, 

I'm looking for a way to suppress constituents in my extractions who we do not have an email for. I have a suppression that works for emarket restrictions, but what do you do when you want to suppress anyone who simply doesn't have an email? I do not see any options for simply "email does not exist". Any help would be much appreciated. 

Thanks!

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