You could always make it open-source and allow users to "download" and "upload" their mailbox. This way, when one service provider is shutdown, you can find a h

You could always make it open-source and allow users to "download" and "upload" their mailbox. This way, when one service provider is shutdown, you can find a host and install the email system and upload your mailbox. I had a similar idea, but I have no time to execute it.