Classic building blocks that were designed for our classic templates do not work in the new templates. Likewise, building blocks for the new templates aren't compatible with classic templates.
Why aren't classic building blocks compatible?
Our classic building blocks were marked up with set pixel widths. This is incompatible with the new templates, which don't rely so heavily on pixel widths to allow for responsiveness.
Adding a classic building block in a new template will result in breaking that template on most mobile devices.
In short, we recommend using one of our classic templates if you want to use your old building blocks.
How can I use my classic building blocks?
The easiest way to use classic building blocks is to use an existing classic template in your account. If you don't have one, you can create a template from a sent campaign which used a classic template:
Find your existing campaign
Select the checkbox to the left of the campaign
From the More actions dropdown, click Copy to library.
Converting classic blocks to new building blocks
We offer a service to rebuild your existing blocks so they work in our new responsive templates.
Please note: Although the look of your classic building blocks may change slightly during the rebuild process, emails will certainly display better on a greater number of devices.