Hi,
I assume Yahoo DOES 'back up important data'. The problem here is different: The Yahoo computer system probably (falsely) figured that there was suspicious activity going on. (It probably saw my logon
That is why you should use local mail client for reading e-mail and not webmail. You can also set that your local client stores a copy of your mail locally (for instance with POP3). With IMAP you can move e-mails from one provider to anothe easily. So in that case it is very easy to move from one mail provider to another. Then you can use a cloud and send your *encrypted copy* of local mail there. Ubuntu for instance offers 2Gb for free. And they also have a tool called Duplicity, which is able so make an encrypted backup - you just set it up and it works automatically. Regards, M.