Microsoft no longer supports submitting your podcast via e-mail

This is what they send back when you email them your podcast info

Thank you for your interest in podcasts. We are no longer supporting an active database of podcast feeds for Windows Phone 7, Windows Phone 8.0 or Zune. Please see the instructions below for enabling podcast discovery in Bing.

Windows Phone 8.1
Windows Phone 8.1 uses a Bing-enabled search mechanism to locate podcasts. To improve the search results of your podcast, add "feed:podcast" to your keywords tag within the RSS podcasts feed. Podcasts can also be located by entering the RSS feed directly into the podcast app search window.

Improve Bing-Enabled Podcast Search Results By using Webmaster Tools, you can tell Bing about your site. In return, Bing Webmaster Tools tells you how well your site is performing in Bing and Bing-powered search and keeps you up to date about issues we see on your site.

To inform us about sitemaps or RSS feeds, including those containing podcasts, follow these steps:

1. If you haven’t done so already, sign up with Bing Webmaster Tools.
2. Add the site that hosts the Podcast RSS/feed and verify ownership of the site.
3. Use the Submit Sitemap tool and submit the full URL of the RSS feed containing the links to your podcasts.

Within a few hours, you’ll see whether Bing successfully downloaded your sitemap or feed so that it can be indexed.

Has anyone submitted a podcast this way?

We use a Feedburner link for our feed so it's impossible for us to verify ownership of the feed. I did just submit our direct feed url and will see how that works.