I want to add my voice to the criticisms of the next best time. Though it says that it is beased on our contacts opening the email, this is frankly not possible. It always suggests Saturday mid-afternoon which is problematic becuase 1) as a Jewish organization our customers are not oepning up emails on Saturday afternoon and 2) because our organization has a policy of not sending out emails on sabbath. Minimally I'd suggest adding a feature for users to customize when possible times are for sending of email so that we could block off the Sabbath as possibilities.
But also, you should look into how the feature works, becuase I think that it's not even fulfilling it's described purpose of predicting based on past open rates.
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