[ALUG] Webmail that can read local mbox files?

Does anyone know of a reasonably up to date (i.e. still maintained) webmail application that can use local mbox files? I have been trying a couple of webmail applications with IMAP servers (both UW Imap and dovecot) but the IMAP implementations are so awful that they make them very awkward to use IMHO. -- Chris Green (chris@areti.co.uk) "Never ascribe to malice that which can be explained by incompetence."