How do rendering tools simulate inboxes?
Rendering tools maintain environments replicating email client configurations. They send your test email to these environments, capture screenshots of how messages display, and present results for comparison.
Environment types: actual email clients installed on various systems (real rendering), virtual machines simulating client configurations, and browser-based webmail captures. Combination ensures authentic representation.
Maintenance challenge: email clients update frequently. Quality tools update their environments to match current client versions. Outdated rendering environments show how emails looked months ago, not how they appear to recipients today.
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