Replit
email
Email HTML Stripped by Email Clients
You designed beautiful HTML emails for your Replit app, but when recipients open them, the formatting is completely wrong. Images are missing, layouts are broken, CSS styles are stripped, and in some cases the email appears as plain text with raw HTML tags visible.
Email clients (Gmail, Outlook, Apple Mail, Yahoo) are notoriously aggressive about stripping HTML and CSS that they consider unsafe. Unlike web browsers, email clients do not support modern CSS, JavaScript, or many standard HTML features. Each client strips different things in different ways.
AI-generated email templates almost always use modern web CSS (flexbox, grid, external stylesheets, CSS variables) that email clients will strip or ignore entirely, leaving your carefully designed emails looking broken.
Error Messages You Might See
No error messages — emails send successfully but render incorrectly
Images show as broken icons in email
Email appears as plain text with HTML tags visible
Formatting completely different in Outlook vs Gmail
Common Causes
- External CSS stylesheets — email clients strip <link> tags and only support inline styles
- Modern CSS features — flexbox, grid, CSS variables, and media queries are not supported by most email clients
- JavaScript in emails — all JavaScript is stripped by every email client
- Background images via CSS — many clients ignore CSS background-image properties
- Unsupported HTML tags — email clients strip <div> positioning in favor of table-based layouts
- Image hosting issues — images linked from localhost or Replit dev URLs are not accessible from email clients
How to Fix It
- Use inline CSS only — put all styles in style="" attributes directly on HTML elements, never in <style> tags or external files
- Use table-based layouts — email HTML requires <table> elements for layout, not div/flexbox/grid
- Use an email framework — libraries like MJML, React Email, or Maizzle generate email-safe HTML from modern syntax
- Host images externally — use Cloudinary, S3, or your CDN for email images with absolute HTTPS URLs
- Test across clients — use Litmus or Email on Acid to preview your emails in Gmail, Outlook, Apple Mail, and Yahoo
- Include a plain text fallback — always send a multipart email with both HTML and plain text versions
Real developers can help you.
Dor Yaloz
SW engineer with 6+ years of experience,
I worked with React/Node/Python
did projects with React+Capacitor.js for ios
Supabase expert
Alvin Voo
I’ve watched the tech landscape evolve over the last decade—from the structured days of Java Server Pages to the current "wild west" of Agentic-driven development. While AI can "vibe" a frontend into existence, I specialize in the architecture that keeps it from collapsing.
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Krishna Sai Kuncha
Experienced Professional Full stack Developer with 8+ years of experience across react, python, js, ts, golang and react-native. Developed inhouse websearch tooling for AI before websearch was solved : )
Prakash Prajapati
I’m a Senior Python Developer specializing in building secure, scalable, and highly available systems. I work primarily with Python, Django, FastAPI, Docker, PostgreSQL, and modern AI tooling such as PydanticAI, focusing on clean architecture, strong design principles, and reliable DevOps practices. I enjoy solving complex engineering problems and designing systems that are maintainable, resilient, and built to scale.
David Olverson
Solo dev shipping production apps with AI-assisted development. I specialize in rescuing broken Lovable/Bolt/Cursor builds and taking them to production. 10+ apps shipped including SaaS CRMs, gaming platforms, real estate tools, and Discord bots. Stack: Next.js 16, TypeScript, Tailwind CSS, FastAPI, PostgreSQL, Prisma. I use Claude Code with 50+ custom skills for rapid delivery. Average turnaround: 2-4 weeks from broken prototype to production.
Richard McSorley
Full-Stack Software Engineer with 8+ years building high-performance applications for enterprise clients. Shipped production systems at Walmart (4,000+ stores), Cigna (20M+ users), and Arkansas Blue Cross. 5 patents in retail/supply chain tech. Currently focused on AI integrations, automation tools, and TypeScript-first architectures.
Daniel Vázquez
Software Engineer with over 10 years of experience on Startups, Government, big tech industry & consulting.
Simon A.
I'm a backend developer building APIs, emulators, and interactive game systems. Professionally, I've developed Java/Spring reporting solutions, managed relational and NoSQL databases, and implemented CI/CD workflows.
Jen Jacobsen
I’m a Full-Stack Developer with over 10 years of experience building modern web and mobile applications. I enjoy working across the full product lifecycle — turning ideas into real, well-built products that are intuitive for users and scalable for businesses.
I particularly enjoy building mobile apps, modern web platforms, and solving complex technical problems in a way that keeps systems clean, reliable, and easy to maintain.
Milan Surelia
Milan Surelia is a Mobile App Developer with 5+ years of experience crafting scalable, cross-platform apps at 7Span and Meticha. At 7Span, he engineers feature-rich Flutter apps with smooth performance and modern UI. As the Co-Founder of Meticha, he builds open-source tools and developer-focused products that solve real-world problems.
Expertise:
💡 Developing cross-platform apps using Flutter, Dart, and Jetpack Compose for Android, iOS, and Web.
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🎯 Revamped the Vepaar app into Vepaar Store & CRM with a 2x performance boost and smoother UX.
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Milan is always happy to connect, work on new ideas, and explore the latest in technology.
You don't need to be technical. Just describe what's wrong and a verified developer will handle the rest.
Get HelpFrequently Asked Questions
Why does my email look fine in Gmail but broken in Outlook?
Outlook uses Microsoft Word's rendering engine for HTML emails, which has extremely limited CSS support. You must use table-based layouts and inline styles for Outlook compatibility.
Can I use CSS flexbox in emails?
No. Flexbox, grid, and most modern CSS features are not supported by major email clients. Use HTML tables for layout and inline styles for formatting.
What is the easiest way to create email-safe HTML?
Use MJML (mjml.io) — it lets you write simple markup that compiles to email-safe HTML with table layouts and inline styles automatically.