http://artsy.github.io/blog/2014/03/17/some-tips-for-email-layout-and-responsiveness/
One Column
This is a full width one column block. We use padding on the <td>, being widely accepted across clients. Set the wdith of the image inline as a baseline, and using CSS we override it with 100% !important making it fluid.
Two Column - A
Two Column - B Two Column - 70/30
Two Column - 30/70 w/Border
Three Column w/ buttons
Background image w/ text overlay
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