Question 1

How are email client previews generated?

Accepted Answer

EmailTestLab uses intelligent client simulations based on documented CSS behaviors and rendering rules for each email client. This allows instant switching between clients (under 50ms) and dark mode testing. Our simulations are perfect for rapid development testing and catching most rendering issues.

Question 2

What makes EmailTestLab faster than other tools like Litmus?

Accepted Answer

Traditional tools use screenshot-based rendering which takes 30+ seconds per test. EmailTestLab uses client-side iframe rendering with CSS transformations, completing all 13+ quality tests in just 2-3 seconds. This is 10x faster and uses 80% fewer server resources.

Question 3

What quality tests are included in EmailTestLab?

Accepted Answer

EmailTestLab runs 13+ comprehensive tests: Subject Line Analysis, Preview Text Optimization, Email Size & Gmail Clipping, Plain Text Version, Unsubscribe Detection, HTML/CSS Validation, Mobile Optimization, Personalization Detection, Dark Mode Support, Spell Check, Spam Score Analysis, Links & Images Validation, and Domain Authentication (SPF/DKIM/DMARC).

Question 4

Is there a free tier for EmailTestLab?

Accepted Answer

Yes! The free tier includes unlimited email tests, all 13+ quality tests, 6 email clients, dark mode testing, and basic accessibility checks. Perfect for individuals and small teams.

Question 5

Does EmailTestLab actually send emails?

Accepted Answer

No! EmailTestLab is a completely safe testing environment. We analyze your email HTML locally in the browser without sending any actual emails. This means you can test freely without worrying about accidentally sending emails to real recipients or affecting your domain reputation.