mailhero.io lets you set a username, then anything sent to *[email protected] is forwarded to an e-mail you choose. It's only somewhat an e-mail host at the moment (added a few weeks ago), and it has stated that the hosting is only temporarily free, but if you already have a host this can give the feature without requiring any form of migration.

There was an HN discussion about it fairly recently, https://news.ycombinator.com/item?id=11781361