BIS Hosted Email (.net) - Get Your Free Forwarding for 1 Year
To everyone who has raised the issue of losing your BIS-hosted email address (such as firstname.lastname@example.org), BlackBerry now supports forwarding of your previous BIS hosted address (again, only the .net or .com BlackBerry addresses), so that you don't lose access immediately and have time to migrate to a new email address.
Instructions are here:
KB33260-BlackBerry (hosted) email address forwarding for BlackBerry 10
Forwarding is currently available for hosted .net addresses on Canadian and select European providers. Correction: all official launch carriers (in Canada, Europe, the Middle East and Africa) appear to be supported.
The article doesn't state support for any US carriers right now but the following URLs appear to be active and the system appears to be functioning (for those lucky ones who have a Z10 in the United States):