Sorry to shoot and run, but I think you're trying to tackle this problem in the wrong way. The problem isn't to drop the mail. The solution is to change email hosting providers. As a non-profit I believe Google hosted apps would be an option (free). Then it would be possible to simply leverage that service and not have to worry about the forwarding. (You'd maybe save time and get (great?) spam filtering in the process)
- [gentoo-dev] Anti-spam changes: proposal to drop spammy m... Robin H. Johnson
- Re: [gentoo-dev] Anti-spam changes: proposal to drop... Eray Aslan
- Re: [gentoo-dev] Anti-spam changes: proposal to ... Tobias Klausmann
- Re: [gentoo-dev] Anti-spam changes: proposal to drop... Tony Vroon
- Re: [gentoo-dev] Anti-spam changes: proposal to drop... Niels Dettenbach
- Re: [gentoo-dev] Anti-spam changes: proposal to drop... Andrew Savchenko
- Re: [gentoo-dev] Anti-spam changes: proposal to ... Niels Dettenbach
- Re: [gentoo-dev] Anti-spam changes: proposal to drop... Charles Nérot
- Re: [gentoo-dev] Anti-spam changes: proposal to ... C Bergström
- Re: [gentoo-dev] Anti-spam changes: proposal... Rich Freeman
- Re: [gentoo-dev] Anti-spam changes: prop... C Bergström
- Re: [gentoo-dev] Anti-spam changes:... Rich Freeman
- Re: [gentoo-dev] Anti-spam chan... C Bergström
- Re: [gentoo-dev] Anti-spam ... Alexis Ballier
- Re: [gentoo-dev] Anti-spam ... Ciaran McCreesh
- Re: [gentoo-dev] Anti-spam ... Alexis Ballier
- Re: [gentoo-dev] Anti-spam ... Michał Górny
- Re: [gentoo-dev] Anti-spam ... C Bergström
- Re: [gentoo-dev] Anti-spam ... Matthew Thode
