Migrating Archived Email Message to WordPress

I have an archive of email messages from a mailman discussion list that I would like to recreate as a series of WordPress posts. The archive currently exists as an mbox file that I’m pruning with an email reader. Once I have the collection culled to what I want to retain I thought it would be nice to use an email reader with a redirect command that would permit me to then send those messages to my WordPress site using the post by email function.

Does this approach make sense? Are there alternatives I should consider?

Oh — and I need to find a current mail program that will allow me redirect existing messages to a new address as opposed to using forward.