At present, the following limitations are known to exist with this package,
 - Redirected E-mails can loop: If you setup one [hashed] user, let's call
   that user "jack" to redirect to another [hashed] user, "jill", and you
   have inadvertently previously setup jill to redirect to jack, the mail
   will loop. This is not detected by qmail's normal mail-is-looping
   mechanism, since that has been bypassed by this code. I believe I
   have a fix for this, but haven't had time to investigate thoroughly.
   That means that at present, you need to be particularly careful if
   you setup any redirections. If it's just delivery to Maildirs you do
   with this code though, you should be fine.
 - You should make sure you're aware of the security issues with this
   code. For that, see the SECURITY text file.
 - As it currently stands, this code does not handle synonym domains
   well - i.e. if bob@somedomain is always going to be the same
   user as bob@someotherdomain, with the current system, you'll need to
   setup individual aliases for each user in the domains. I plan to
   rework the hashing, such that it hashes on domain separately to
   username. This will enable whole domains as well as just userames
   to be aliased.
