Typical of programmers, there are several overly-complex schemes for exporting e-mail archives to Google's Gmail using Python, Unix commands, the Terminal and so on.
But as a correspondent to the Salted Wound blog suggests, there's a much easier way:
... create a new rule in Mail.app with the action "redirect to [email protected]". Have it match whatever messages you're interested in bouncing up to gmail, for example all of 'em. Select the messages you're interested in sending off and
run Message -> Apply Rules. Done!
If you leave the rule in, new (matching) messages will also get
bounced to gmail (and still preserved in Mail.app).
