To migrate a Courier mailbox to Thunderbird (on Windows XP) you need Courier installed, Thunderbird installed and a program called Courex (get the latest copy here Courexor see the attachments for this page).
See table below to details about migration
What? | Will migration work? |
|---|---|
emails | yes |
folders and subfolders | yes |
attachments | yes |
mailing lists | no |
address book | yes |
signatures | no |
...