Compatibility with Mandrill - styling issues

I use wpMandrill to deliver my transactional email. However, since switching to Mandrill from regular wpmail, the formatting of the emails sent via Subscribe by Email are altered - mainly, they have a lot more vertical space in the lines (unsure if its line height or additional line breaks).

I'm sure this is a template issue with Mandrill, as they may be trying to enforce a template or standard of some kind. This is not an issue with eNewsletter - only with SBE.

Is there a way to resolve this? Can a template be created that can be placed into Mandrill that duplicates the SBE mail template?