By default, it supports 1-3 columns and as you trigger each media query conditional statement, it converts to a one a column layout for mobile devices.
Released by Email on Acid, this pre-designed template offers three 'layouts' which trigger based on the width of the screen.
Responsive Email Template from Email on Acid The download package includes both layered PSDs and the HTML source. Green Village is a minimal and pre-designed email template that is suitable for multiple purposes. They also come with the PSD source files. Litmus have released a bundle of seven pre-designed responsive email templates that been thoroughly ‘Litmus-tested’. Start Downloading Now! Pre-Designed Responsive Email Templates Litmus Responsive Email Templates (7 Templates)