Hi, thank you for contacting JustAnswer.com. My name is Russell. I will do what I can to provide the right answer to your question.
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Scan-to-email function is generally dependent upon what software you use, with such 'home' or 'home office' printers as the HP Photosmart line (as opposed to large, industrial-copier-like printers made by Konica-Minolta and other brands.)
The thing to do with an HP Photosmart, is to get the HP Director (or HP Solution Center, depending on the exact model line and how HP distributes software.)
In the case of this model... well, you haven't stated the model #. Please let me know, in Reply, exactly what Photosmart you have, and I will advise you further.