A better way to contrain the width of the message box whilst also allowing it to...

A better way to contrain the width of the message box whilst also allowing it to shrink on narrow displays

Setting a hard "width" it very compatible, but won't squeeze on narrow screens. Setting max-width works well, except in Outlook and Hotmail. We resort to old skool table tricks: a table with width=100%, with 3 columns, only oneof which, the middle one, had content, and a fixed with. This works.