Can I access my /var/spool/mail/$USER using mozilla-mail & thunderbird. When I use the wizard all I see is pop/imap options. may be it's a too dumb question. But any help would be greatly appreciated.
One way of doing this would be to run dovecot as a POP and/or IMAP server on your machine. You could then access your mail using the POP/IMAP options of your mail client.
Paul.