I regularly put together the Email Campaigns for Huawei Enterprise. They are delivered to me in either an image format or in Adobe InDesign files. The newsletter with the constraining border is particularly challenging because the client requested that the design be totally preserved (no altering of the border or design), but that all the text be selectable. After meticulous Photoshop slicing and a lot of hand-coding/HTML modifications and rigorous testing, we've been able to ensure that the email looks legible across email clients.
Adobe Indesign Adobe Photoshop CSS Email Campaigns Email Cross-Client Compatibility HTML Slice Tool Web Development