Hi,
These links:
http://dag.wieers.com/rpm/packages/pine/pine-4.64-3.el4.rf.i386.rpm
http://staff.washington.edu/chappa/pine/info/maildir.html
on this page
https://wiki.dovecot.org/Migration/MailFormat
at the Dovecot wiki do not lead to useful results.
The dag.wieers.com link seems to redirect to a server at packages.sw.be that does not exist (or does not answer today). Not archived at Wayback Machine as far as I can tell.
The washington.edu link returns a 404. This page does appear to be archived by the Wayback Machine, but many of the captures reported by the Wayback Machine actually return no results. I have not checked every capture. I did find a capture from 4 Oct 2008 that does have content. This is the link to that capture.
https://web.archive.org/web/20081004145454/http://staff.washington.edu/chapp...
Perhaps someone who attends to the Dovecot Wiki will find this information helpful in updating that page in a useful way.
Regards,
Ken