Hi there everyone!
I’m delighted to announce that we’ve rolled out this functionality to all HubSpot porals, allowing you to preview the personalised elements in your Marketing Email within the Email Editor.
With this release, Marketing Email users can now preview and sent a test email with all CRM object and Custom object personalisation tokens populated in a Marketing Email.
Thank you for supporting this idea. We’d love to hear your feedback & hear how else we could further help you optmise your Marketing Emails 
Best,
Mícheál