Are you able to remote log in to your email system?
If so you should be able to gather enough information to download everything into a local browser based email program for archiving purposes.
I used "
Seamonkey 2.2.1" which has the old Netscape style mail interface with a modern day front end.
You'll need the following from your current email host:
As an example
Server name: mail.optonline.net
User name: (insert your user name here)
outgoing mail server: mail.optonline.net
You will have to supply your password when you log in, but after that you should not need it as the system will remember it.
Once the browser is loaded on your system, in the bottom left hand corner you will see a mail icon, click it and follow the instructions on how to set it up with your current server interface.
I recently did this for my browser based email as a back up, works great as you can configure it to leave your emails on the server, as well as on your local computer.
Hope you find this helpful.
Bill S.