I'm looking for Windows 7, MacOS and Ubuntu Linux equivalents of Express Archiver for Windows XP that archived Outlook Express emails to individual files.
This program does the job so well: It archives the whole email plus headers, provides a multitude of options for naming the file based on email content, provides unique naming should 2 email files have the same name, attachment options put in a sub-folder etc.
It means that the archived files do not rely on a specific program to view them. Emails are plain text, attachments are files placed in a folder. Email as separate files are convenient to manage, move around, organise and search using standard tools.
I haven't found a tool for the newer OSs though, and XP and Outlook Express are becoming obsolete.