Fixing Email Formatting in Clay for Lemlist Sync

Hi. I'm trying to craft a personalized cold email series in Clay that then gets sent (via the API) to Lemlist. The email looks fine in Clay, but when it lands in Lemlist all the formatting is gone. I think i have to fix this on the Clay side because I'm syncing the complete email body in the Clay field to Lemlist via a custom field. how can this be accomplished?