Short of running my own mail server I don't think I have IMAP available to me. I started my net email days on IMAP servers. There simply was no POP3 around.
If I did set up IMAP, the PITA would be having to be connected to touch any of my mail. I really need offline ability so I can at least read and compose for future delivery.
But you're right, it would solve the problem. Even if I used it in a more POP-style, by downloading everything to the local machine. Using creative settings for POP mailbox message deletion I think I can keep the inbox contents in sync, but this doesn't do anything for my "sent" mail. Anyone who uses multiple machines from which to send mail knows the frustration of looking for a particular piece of sent mail, only to discover it was on the "other" computer.
Bruno