Shared Mailbox processes messages sent to multiple
prefixes@a.particular.domain handled through a
single mailbox. This is useful for those running
mailing lists or low budget mail facilities for
multiple users and aliases through a single domain
but where a static IP address is not available and
POP3/IMAP or similar mailbox availability is
limited. It is installed in a pseudo-user's
.forward or .qmail file and provides an
alternative to fetchmail for the local
distribution function. Unlike fetchmail,
externally aliased addresses (e.g., for remote
mailing list owner or approval addresses) are
handled. Mail loop detection is provided through
a header unique to each installation and by
counting Received: headers.
