I had occasion the other evening to transfer a few dozen Waveson-related e-mail messages from Apple Mail on my personal Personal Computer, as it were, to Outlook 2003 on the Dell which I’ve been mostly using for work these days (if only because it has a larger display).Looking on the web, I found that most of the advice available had to do with transferring e-mail in the other direction, but the following work well for me:

1. I exported the messages from Apple Mail to mbox format. I found it useful to export to two mbox files, one for received and the other for sent messages. Equally, I found it useful to save the files with a .mbox extension, the better to be picked up by the next step.
2. I converted the mbox files to corresponding folders of .eml files using IMAPSize. (See the mbox2eml option on the Tools menu.)
3. I imported the .eml files into Outlook Express (OE); you can just drag and drop the files into the application window.
4. I imported the e-mails from OE into Outlook 2003, by selecting “Import and Export..” from the File menu, then “Import from another program or file”, and “Outlook Express 4.x, 5.x, 6.x”. At this point, Outlook warned that “No internet accounts were found to import”, but the next option prompted me to import e-mail messages and addresses from Microsoft Outlook Express, and this only took a second, or two, to run for three dozen, or so, messages.