rogerd - 9:19 pm on Sep 29, 2003 (gmt 0)
I'm dubious about the challenge/response system for anything other than personal users. I get far too many auto-generated e-mails that I need to see - monthly invoices, PPC balance info, PPC management updates, selected forum notifications... the list goes on and on. I'm sure there's some mechanism to manually add these, but in many cases I don't know what the originating address is. Also, I've seen originating addresses change periodically without notice, which could result in lost mail.