Online Tools and Visual Editors for Resend

Optimize your email design workflow and test domain configurations using these web utilities.

1. Template Design and Previews

React Email Visual Previewer

• Link: react.email/docs/introduction
• Purpose: Launch a local preview server (npx email dev) to test responsive styling changes on desktop and mobile layout screens.

HTML Email Checkers

• Link: caniemail.com
• Purpose: Check if CSS properties (like flexbox or grid CSS) are supported inside recipient engines (Outlook, Gmail).

2. Deliverability Testing

• Mail-Tester: Send a test email from Resend to Mail-Tester to analyze SPF, DKIM, and DMARC alignments.
• MXToolbox: Lookup DNS configurations and verify if your domain IPs are flagged on email blacklist lists.