Eudora Mailbox Cleaner is a simple drag'n'drop application which provides easy one-step migration for your messages and other mail related data. The following functionality has been implemented:

Mailbox Importing (from Eudora or Thunderbird to Apple Mail or Thunderbird)

• Direct conversion from Eudora or Thunderbird mailboxes to Mail.app *.mbox packages or Thunderbird mbox/*.msf files. Aside from being faster than the "Import Mailboxes…" in the respective applications, the following problems are fixed as well:
  • Date for sent messages is set properly (i.e., not the date when the messages are imported)
  • "To: " headers will not be lost when importing sent messages into Mail.app
  • text/enriched (Eudora's "rich text"), text/html, and multipart/… messages are imported properly
  • Message status flags (sent, replied, forwarded, …) are preserved upon import (if this does not work for you, see the remark below)
  • Attachment recovery: if the original attachment of a message can be found inside Eudora's "Attachments Folder", the attachment will be re-encoded and attached to the message using proper MIME-compliant encoding.

Nickname Importing (from Eudora to the Mac OS X Address Book or Thunderbird)

• Directly import Eudora nickname files into the MacOS X's Address Book or as address book in the default Thunderbird profile. Nicknames marked as "Do not include this nickname when syncing" in Eudora will be ignored.
• All group information will be converted from Eudora to the Address Book and mailing lists will be imported as well.
• Accented characters will import properly into Thunderbird and won't show up as gibberish like they do when using the Thunderbird import.
• See the remark below if auto-complete of addresses in Mail does not work after import.

Filter Importing (from Eudora to Apple Mail)

• Directly convert Eudora filter files into rules for Mail.app

All of these features have been tested importing files from the English versions of Eudora (5.1 through 6.2 on OS X) to Mail.app (version 1.1, MacOS X 10.1.2 up to version 2.0.7, MacOS X 10.4 "Tiger") and Thunderbird (version 0.7.1 through 1.5 in OS X). The import from nicknames into the Address Book has been tested for Address Book 3.0.3 (MacOS X 10.2.6) through 4.0.3 (MacOS X 10.4). Your mileage may vary for different versions… According to user reports, the applicactions works just fine with Classic Eudora data as well.

Mailbox Importing

• Attachments will be only re-attached to the message if the attachment can be found inside Eudora's "Attachment Folder" and the attachment has not been renamed. Attachments which can not be located during the conversion process will be marked as "(missing attachment)" at the end of the message
• Attachments will be only re-attached for incoming messages - all outgoing messages will lack attachment information
• Empty mailboxes will not be converted (this is by design)

Nickname Importing

• Some fields available for nicknames in Eudora are not available or not accessible in Address Book for system versions before 10.3. Those fields are: "Nickname" (will be imported into the "Nickname" field inside Address Book but is not accessible from the UI), "Full Name" (will be ignored for the Mac OS X Address Book, Thunderbird will use this as the "Display Name"), and "Photo" (will be ignored)
• Address Book only allows a single entry for the "Homepage" field. The first "Web" field from Eudora will be used, all subsequent entries will be added to the "Notes" of the contact. Thunderbird allows two home pages - one for "home" and one for "work" - the first webpage in the additional entires in Eudora will be used as the work homepage.

If you are looking for a more customizable export of your Eudora nicknames to vCards (which can be imported into the Address Book), you might want to check out Eudora vCard Export, another application I wrote.

Filter Importing

• Mail has a more limited support for filter rules and actions than Eudora. Therefore, only rules/actions which are supported will be imported (Eudora's "Label" will be imported to Mail's "Color")
• As opposed to Eudora, Mail allows only for one action out of "reply", "redirect", and "forward". When the program encounters more than one of these actions upon importing, the first one will be imported.
• When importing rules which contain transfers to mailboxes, please note the following: the path for mailboxes where the messages will be transferred to is "/Import/MailboxPath/MailboxName" (i.e., inside the import folder created when converting mailboxes). Since this is the default location where the mailboxes are located after a successful import, this should work properly (when moving the mailbox to a different location later, the rules will be updated accordingly)