Go to the Edit menu, Message Filters, New. Then select the list email by the subject line or the To field and have Netscape move them into a special list folder.
"I use Outlook Express and there is a very easy way to filter. Just go
to message rules under the "Tools" menu bar. Click on mail. Under "mail
rules," click on "New". It will give you instructions to filter your mail.
Basically, if you set it to put all mail where the "TO" line is for
the new group (email@example.com) and create a special folder (perhaps called
"MDCFUG") to put these messages in, you will find that all your mail
goes straight to this folder, to be read at your convenience.
To filter your mailing list email in Eudora, view a sample message that came in from the mailing list and select (Special->Make Filter). The filter dialog box will pop up. Choose to filter messages with the shown "Recipient" and type in a mailbox name to put these messages in.