[Mailman-Users] MBOX "format"?

[schuetzen]

trying to import a file or two of messages (must be in unix format) from Agent
on Windows to Agent under Wine.

Kaplan at Forte says that the message must be in MBOX format.

can anyone tell me how I can change my 5mb files so that I can remove the
======== before each message and inject something that will make it mbox format?

I realize that newbie message tolerance is almost non existent on this list but
I thought I would push the envelope.

thanks
chas