How often should templates be audited?

Set a calendar reminder for every three months. That's your baseline. Quarterly audits catch the slow creep of problems. CSS piles up, components drift from your brand guidelines, and rendering breaks go unnoticed until they hit your metrics.

But don't treat quarterly as a hard rule. Certain events demand an audit right away. When Gmail or Outlook releases a major update, run an audit. When Apple Mail changes how it handles images or links, run an audit. When you refresh your brand or design system, audit everything. These aren't "nice to do" moments. They're signal events that can break your templates.

Here's what to check in each audit. Test rendering across your top email clients. Most people use Gmail, Outlook, Apple Mail, and maybe a few others. Check dark mode behavior since that's become standard. Review your code quality. Are there deprecated tags? Unnecessary complexity? Run accessibility checks. Do all images have alt text? Do your headings and links make sense to screen readers? Does everything still match your brand guidelines?

Create a simple audit checklist you can reuse. Track what you test, what breaks, and what you fixed. Store this somewhere your team can find it. Over time, you'll spot patterns. Maybe Outlook always breaks in certain ways. Maybe dark mode reveals contrast issues you didn't catch before. These patterns guide your template improvements.

Schedule your first audit now. Pick a day next week and block time for it. This single habit saves you from surprise rendering disasters and keeps your templates sharp.

Related: pre-send testing, dark mode testing, A/B testing.