- 1Columns are stacked by default, so they appear properly on mobile devices. However, because columns rely on media queries, they do not work on tablets.
border-radiusis not supported on Outlook 2003, 2007, 2010, 2013.
- 3 The mobile layout is shown on Gmail for the few versions that still don't support responsive styles (read more about this).
Latest update on 2017/02/17 using MJML > 3.3.0