On the Laravel News site there's a new post covering a new inclusion into the Homestead VM: Mailhog:

A new Homestead base box has been released: Version 1.1.0. This release includes a new local mail handing system named Mailhog. The grunt-cli npm package is now installed globally, OPcache is now always invalidated, and finally we added some package-cleanup to the build process to lower the download size of the final compressed base box.

Long time Homestead users may remember that it previously supported the Ruby application, MailCatcher. By moving from MailCatcher to Mailhog the installation and configuration is easier than ever before.

They talk briefly about the steps needed to upgrade to Mailhog from MailCatcher and how to update your Homestead environment to take advantage of this latest change.