You can, however, get a similar effect by forwarding all your mail to your Gmail account and configuring it to send mail as your domain email address (including using your SMTP server if necessary).

It has been hidden, but not discontinued. You can still create a trial Google Apps account, and then "downgrade" to free account with 10 user limit

Not to mention the fact that you can still get excellent Outlook.com webmail with your own domain for free.