The easiest way to migrate mail would be to drag and drop folders from a Groupwise IMAP account in Thunderbird to another IMAP account (such as Gmail) in Thunderbird. Groupwise supports SOAP, POP and IMAP accounts.
Then you can import the mbox files using the ImportExportTools add-on, and resume using the article for how to import your other data. If you created your Evolution profile using a version that defaulted to maildir you will need to use a tool to convert maildir files into mbox files for multiple folders, such as maildirarc or maildir2mbox. Evolution 3.2.0 and later uses maildir files. It was written when Evolution defaulted to using mbox files, just like Thunderbird does. How To Migrate From Evolution To Thunderbird In Ubuntu Intrepid describes how to migrate the mail, calender, tasks and address book. Either drag and drop them to the appropriate directory in your Thunderbird profile or import them using the ImportExportTools extension. Open Entourage and drag and drop the folders to the desktop. They have created a open source version based on Thunderbird.
Another possibility would be to upgrade to Courier email client (its follow-on), let it import your data, and then migrate from Courier to Thunderbird using Courex. You could use the ImportExportTools extension to import the folders.
box file but provides an archive option to export folders as mbox files, which is what Thunderbird uses.
If you're moving from a old PC to a new one its typically easiest (and safest) to install Thunderbird on the old PC, import your e-mail, settings and address books and then move the Thunderbird profile to the new PC. No matter how you import or export your e-mail its a good idea to back up your e-mail first in case something unexpected happens. LDIF file you can import it using Tools -> Import -> Address books -> Text Files. If your old email client supports exporting the address book as either a. Whats unusual about this one is that provides a lot of control over how it converts the. A Google search will find several eml to mbox conversion programs. EML files to a mbox file and then import the mbox file using the ImportExportTools extension. EML files using the ImportExportTools extension try using eml2mbx to convert the. Sometimes email clients use "Unix format" to refer to a mbox file since the format was originally developed for Unix systems. EML files due to the popularity of Eudora and Outlook Express. mbox as the file extension) to store messages or provide a way to export folders as mbox or. Many email clients use mbox files (regardless of whether they use no file extension. The ImportExportTools extension can import and export mbox and. Thunderbird, Netscape, Mozilla Suite and SeaMonkey use mbox files to store the messages for a folder. And if you just need to transfer email between email clients, another option is doing so indirectly via a mail server. EML or mbox files, and some way to export or convert the address books to. If it is not installed or Thunderbird doesn't know how to import data from it, typically you need to find some way to export or convert your old email client's mail files to either.
If your old email client is still installed, the easiest solution is to import the e-mail, address books and settings using Tools -> Import.