You are forced to cut and paste if you want to get the messages in a
digest. I doubt any mail program has been designed to know how to do
anything smarter, and I'm sure "old mozilla" wasn't. Either accept the
hard way, or stop using the "digest" approach.
Apparently the Agent Newsreader (if used for email) has such an
option:
AGENT help>>> If you are on a mailing list and expect to receive digests
on a regular basis, you can set up Agent to burst the digests received,
allowing you to see the contents of each digest as separate sections.
I was sure Eudora has something similar, but can't find it.
Unless "Receive MIME digest as a mailbox attachment"
EUDORA help>>> Turn this on if you want Eudora to create a mailbox
specifically for email messages from a mailing list that supports MIME
digest.
Maybe this means the digest contents will be saved as an MBX
file that can be opened to show individual messages.
--