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Personalize
Whatever list data you can use to personalize, don't be afraid to use it.
Keep it super short
Maximum seven words / 43 characters for mobile.
Preheader text can be longer...
Should be used to be specific and detailed in telling your busy reader what this email is about (AKA why they should open it).
Use numbers
Our brains like organized information, so this just works.
Don't be shy to throw in an emoji
Just be sure to use high levels emoji intelligence (lol no pressure).