About
Email on Acid is an email quality-assurance brand whose current website introduces Mailgun Inspect as the successor to its testing suite. The tools are used before a campaign is sent, helping teams inspect how a message displays across email clients and devices. Existing Email on Acid previews and tests do not transfer to Inspect during migration; annual subscribers move at the end of their current term.
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The published feature set includes previews, checks on links and images, accessibility checks and content-related spam analysis. These address different production risks, from a broken destination link to unreadable content or a rendering problem. The current offering also describes API access for incorporating testing into a larger workflow. Pre-send quality checks support campaign production; they do not establish the sender reputation or recipient engagement that also affects delivery.
