The Legacy Email Problem: Broken Layouts and Fragile Twig Templates
Within modern web development, generating layouts has transitioned into an era of clean, semantic structures powered by CSS Grid and Flexbox. However, the world of HTML email design remains anchored to late-1990s markup methodologies. This structural regression is driven by the vast rendering discrepancies across various email clients.
While web browsers adhere closely to standardized layout engines, email clients parse markup through vastly different systems. For instance, desktop applications of Microsoft Outlook rely on the Microsoft Word rendering engine, which strips away essential styling rules, including margins, padding, flexbox properties, and media queries. Consequently, developers are forced to design emails using highly nested table structures, inline styles, and obscure conditional HTML elements to ensure layouts do not break upon delivery.