Currently the only way view already sent emails is to click on the copy button and create a whole new email (which then you have to delete if all you wanted was to see what the email you sent looked like). It's common practice at other mass-mailing services to be able to just click on a link/button and see the image of what you previously sent without creating this whole new email. It would save me so much time to have this feature! Please fix in the future!!
Great point Crystal. I have been using this since it's the closest to a preview. It's definitely not perfect since the window isn't adjustable, but at least it gives you somewhat of a preview.
Hi Arian, not sure if you've tried this yet, but you can also see an email that was sent under Additional Information. It's not a perfect view, it's similiar to the editor, but it does give a good idea of what the email looked like. You can find this under the report icon once the email is sent. It's one of the big blue font hyperlinks, above the Export button.