We currently do not use the Marketing Email builder, as it is not sufficient for our needs, but build our emails in MailChimp and use Chimpegration to sync the RE database with our mailing lists. This is not ideal though as it is a pain to maintain. Ideally, we would like to build our emails in a 3rd-party builder (like Stripo https://stripo.email/) and export the custom HTML from that platform to the RE email builder. I would love to know if this is on the roadmap, or if it could be added. Thanks!