milkshakesoftware/PreMailer.Net — pull request #42 by tobio (2014-05-09 02:08:20+00:00)
Title: Don't force lowercase on rules and values

There's a couple of reason for this, firstly depending on webservers, urls may be case sensitive and font names should be retained in original casing. Secondly, Outlook.com strips lowercased margin properties, but leaves capitalised properties.