IMAP URLs

[Michael ODonnell]

I just noticed that for any of my email folders Thunderbird will
report an URL of the form:

   imap://userName@serverName/pathName

...and I wonder if there's a Linux tool like wget that I can use
to pull email folders and such from an Exchange server, hopefully
into a local hierarchy whose layout reflects that of the Exchange
server's and, ideally (I can dream!) one file per msg, MH-style.

I've found general info like this:

   http://xml.resource.org/public/rfc/html/rfc2192.html

...but haven't yet found a Linux tool suitable for the task.