Thindata's Mike Kleiman was wondering what happens when you include or exclude a DOCTYPE from an email code so he decided to test it. He shares the results of his test on his brandnew blog.

Main finding: putting the DOCTYPE in doesn't actually do harm, if anything it helps ensure you're rendering to compliance spec in Outlook and Mac Mail... however the downside is since all web clients seem to disregard it or use their own DOCTYPE standard you have to pretty much code for both.

Coding for email is BIG fun :-)