Preview vs Reality
The editor preview shows a close approximation of how your email will look. However, email clients (Gmail, Outlook, Apple Mail) each have their own rendering rules.
Common Differences
Outlook — may add extra spacing around images and tables
Gmail — clips emails longer than 102 KB
Dark Mode — some email clients invert colors in dark mode
Smart Emails is tested against all major email clients. If you notice a significant difference, please contact support with a screenshot.