Email Coding
Email coding (email layout) is the creation of the HTML structure of an email message for proper display in email clients and on different devices.
Simply put:
turning an email design into a functional email for sending
Why email coding is needed
It helps to:
- display the email correctly
- adapt it for mobile devices
- make the email clickable and user-friendly
- increase CTR and conversions
What email coding includes
- HTML structure
- text
- images
- buttons
- content blocks
- Responsiveness
The email should look good on:- smartphones
- tablets
- desktops
- in different email clients
- Inline styles
CSS is typically written inline for compatibility with email clients.
Where it is used
- email marketing
- automated newsletters
- marketing emails
- welcome emails
- transactional emails
- promotional campaigns
Peculiarities of email coding
Email coding is more complex than regular web coding because:
- Gmail, Outlook, and Apple Mail display code differently
- many CSS features are limited
- high compatibility is required
Main requirements
- Responsiveness – the email must be mobile-friendly.
- Cross-client compatibility – correct display in different email clients.
- Fast loading – optimized images and code.
- Accessibility – readability and ease of use for all users.
Tools for email coding
- HTML + CSS
- MJML
- Foundation for Emails
- Figma (for design)
- Stripo
- Mailchimp Builder
Example
A designer creates an email mockup →
the email coder:
- transfers the design to HTML
- creates a responsive layout
- tests display in Gmail and Outlook
This is email coding.
Common mistakes
- images that are too heavy
- non-responsive design
- using unsupported CSS
- missing alt text
- broken layout in Outlook
Difference from web coding
Web coding → for browsers
Email coding → for email clients with strict limitations
Key takeaway
Email coding is the creation of an HTML email that displays correctly across email services and devices. Quality em
