- porting for other MTAs (helpers welcome)

- packaging for other systems (helpers welcome)

- IPv6 support
  Need someone who can do this, since we have no IPv6 environment for
  testing here. 
  For now IPv6 clients are recognized and pass unchecked.

- proper documentation (helpers welcome)

- man page for config settings

- probably SPF support (scored)
  Problem: DUL listed DynDNS MX users might get rejected if they
  use a "mail from:" like user@yahoo.com but deliver direct.

