Hi,
You may go to this
link to learn more about Windows Live Mail and its features and click on
Mail tab. To answer your questions:
1. The local copies of your archived email are store in a folder called Storage folder. Emails that were downloaded/sync are just saved temporarily on your computer. Meaning, if you are offline or removed the account in Windows Live Mail, you won't be able
to view and read the emails.
2. IMAP is simply a transport protocol between a mail client and a mailbox on a server. It's up to the server admin to decide which protocols can be used to access a mailbox. In short, you can use IMAP server only if your email service provider supports
this protocol. As for Hotmail accounts, we are using SMTP, POP and Deltasync when adding the account to mail client programs. If you configure the account via IMAP, it will syncronized all emails in Windows Live Mail displyed as what's in your online account.
You can create a folder under Storage folder to archive your emails if you want to back them up.
3. POP mail server or "POP server" is the most common form of incoming email server. POP server is what receives the email and is almost always used with an SMTP server, which is the outgoing server. Some more advanced, fully-featured
access like EAS and DeltaSync, that not only synchronize the contents of folders between client and server, but also handle other data that has to be kept current, like contacts and calendars.
For more details on how to add an account and how to back up emails other other information in your account in Windows Live Mail, please read these article:
How do I add an account to Windows Live Mail?
How do I import and export email, contacts, and calendars with Windows Live Mail?
Thanks!