A screenshot cannot prove accessibility
Visual previews are useful for layout but do not expose whether images have meaningful alt text, whether reading order makes sense without CSS or whether interactive elements have adequate semantics. Accessibility QA needs source-level checks in addition to rendering tests.
Alt text needs intent, not merely presence
An analyzer can identify an img element with no alt attribute, but it cannot determine whether the supplied text communicates the right purpose. Decorative images may need an empty alt attribute, while functional images need text that conveys the action or information. Automated checks identify review points; humans decide whether the meaning is correct.
Email-client constraints make resilient structure important
Email HTML still relies heavily on table-based layout and inline styles because client support differs from normal browsers. Accessibility improvements therefore need to respect client compatibility. The goal is not to rewrite the template as a modern web page; it is to create the most semantic, readable structure that survives the actual target clients.
Include accessibility in regression testing
A new campaign version can silently lose alt attributes, change link text or introduce client-sensitive CSS. Compare releases at the source level so accessibility does not depend on someone remembering a manual checklist every time a template changes.
Verify the evidence
Use the live analysis that matches this workflow instead of relying on a generic status check.