We have a new graphical charter and we are using more and more "rule" in the design (see the screenshot).

Can you explain me the proper way to code it? It's a simple question, but there is always something wrong with one email client.
For now, I'm using a gosth <td> with border-top css, but I have a problem with the valign... It's never in the middle (in Outlook for exeample).

Can you help me please?