

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.
