Is anyone using RED also using Interspire Email Marketer (formerly SendStudio) to send emails? IEM is doing something to the code upon sending that is causing the layout to become messed up in Outlook, and I was wondering if anyone else has come across that before and how you solved it? I've got columns not appearing side-by-side (they're being shifted down in Outlook 2013) when the same code looks fine when being sent from RED itself and other mailers such as Sendy.co. It's IEM that is mangling up the layout...

Some senders do change the code. We consider that bad practice since it will not allow you to create custom coded emails and, as you can see from your tests, it's not needed! We recommend Mailchimp as sending service, you can set up a free account here.