An anonymous reader writes: I started using email in the early 90s and have lost most of that first decade due to ignorance, botched backups, and so on. But since about 2000, I've got most — if not all — of my email in some form or other. I run Linux, so this has mainly been in a mix of various programs: Kmail, Evolution, Thunderbird. The past 2-3 years are still on the IMAP servers. My problem is that I only rarely NEED to look back to email of 5 years ago. But sometimes it's nice. Or I just want to reminisce about something...or find an old attachment that I was sent. But I do not want to be clogging my current email client of choice with vast backups and even more, I don't know if it will even easily convert. The file structures are different, some are mbox, others maildir, etc., and I would ideally like a way to 1) store and archive these emails, 2) access them, and 3) search by Sender, Subject, Date, Attachments. Is there anything I can do or do I just have to keep legacy applications on hand for this? Should I keep trying to upgrade and pull old files into the new applications? Any help or suggestions about what YOU do would be great.