What Breaks Where: Gmail, Outlook, iOS Mail, and the Email Client Minefield

The design was perfect. The HTML was tight. It looked flawless in the browser. But the moment it hit Outlook 2016? Boom. Buttons misaligned. Fonts swapped. Layout mangled.

Welcome to the email client minefield — where the same code can render beautifully in Gmail, break in Outlook, and invert itself in Apple Mail’s dark mode. If you’ve ever asked yourself “Why does this email look fine here but broken there?” — this article is for you.