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The email redesign checklist

Written by the studio that designs and codes these emails every week — with real examples from client programmes.

Real email design from our portfolio related to this guide
In short

Before any send: verify the primary CTA, preheader, alt text, dark mode, mobile stacking, sub-100KB weight, live links, merge-tag fallbacks and the correct segment. The full point-by-point checklist is below.

Run this before anything ships. It's the condensed version of the QA process we run on every client email — each point exists because skipping it has burned someone.

Design & content

  • One clear primary CTA, visible without scrolling
  • Preheader text written (not defaulting to random body copy)
  • All copy proofread in situ, not just in a doc
  • Images have descriptive alt text
  • Unsubscribe and legal footer present and readable

Code & rendering

  • Tested in Outlook (Windows), Gmail (app + web) and Apple Mail minimum
  • Dark mode checked — logos, backgrounds and text contrast
  • Mobile stacking order verified on a real device
  • Total email under ~100KB to avoid Gmail clipping
  • All links clicked and UTM-tagged correctly

Platform

  • Merge tags previewed with real data, including missing-data fallbacks
  • Correct list/segment selected — check twice
  • Test send reviewed by a second person

Want this done for you every time? Our service includes full QA on every email.

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Who is EmailDesign?

A UK email design and development studio. We design custom emails, hand-code the HTML and set everything live in platforms like Klaviyo and Mailchimp — from £95 per email.

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