I believe some of it is done.
http://www.dungog.net/sme/files/index.phpdungog-mailblocking-1.0-3.noarch.rpm
Copyright: GPL
Requires: e-smith-base, e-smith-release >= 6.0
Obsoletes: dmc-mitel-mailrules, e-smith-domain_mail_user
%description
A rewrite of two rpms and panels into one for ease of maintenance and use
adds a server-manager web panel to allow adding/deleting mailfront
mailrules.
Also adds to /var/qmail/control/mailrules.default the ability to restrict
incoming e-mail to valid e-mail accounts and mailing lists only. E-mail to
invalid e-mail addresses are blocked at the SMTP level.
allows limiting a groups or users email address to nominated domains
%changelog
* Tue Aug 3 2004 Stephen Noble <support@dungog.net>
- rewrite/combine dmc-mitel-mailrules and e-smith-domain_mail_user
- prior data from e-smith-domain_mail_user is used
- prior data from dmc-mitel-mailrules is not
- new
Ed