On Tue, Feb 04, 2003 at 10:23:59AM -0800, Randall Gellens wrote: > At 2:00 PM +0300 2/4/03, Vitaly wrote: > > > i need to send confirmation to the sender that his (or her) mail > >has been loaded by the user during pop3 or imap session. > > Does qpopper provide that? Can i implement by own mail filter > >(program) that scans every recieving mail? is there another > >programm for this purpose? > > Standard Internet email provides for delivery status notifications > (DSNs) and message disposition notifications (MDNs). > > DSNs are requested at the SMTP (transport) level, and can result in > positive acknowledgment of a message's arrival at the last server > (the user's spool). It must be supported by the originating > submission program, and all servers in between. It does not indicate > if the message was ever downloaded by the user, but it can give a > reasonable indication that the message wasn't lost en route. > Mmm. As you are implying this does expect co-operation all the way down the line, plus the co-operation of the end-receiver. I personally never allow DSN messages .. since I politically disapprove of them (but that is another story :) .. They can generate a fair amount of more or less white-noise email, and are unreliable at best. I don't think they can be relied upon as proof of anything very much anyway.
-- Regards Cliff Sarginson The Netherlands [ This mail has been checked as virus-free ]
