On Mon, 10 Feb 2003, Clifton Royston wrote: > Then application of a little logic yields the result that Internet > email is not of any use, because the Internet email system as a whole, > including the SMTP protocol, is not built on "the mail must get > through."
I can think of one MTA which adopts this philosophy - Qmail. Qmail is one of the most abusive pieces of software I've ever encountered and its users almost universally adopt attitudes which border on religious fanaticism. Bandwidth is _NOT_ cheap in large areas of the world and having some bozo running Qmail drive your networking costs up 500% unexpectedly is not pleasant. 1: 1 RCPT TO per message instead of as many RCPT TOs as there are local recipients is a bandwidth attack 2: Opening many parallel SMTP connections to a target server is a state attack. In any case, as noted, this is now wandering way off topic. The only useful DSN I've seen is one which operates at MUA level, but even the ones which can handle automated confirmation of message opening can be disabled and won't tell you if the message was opened while the user was holding down the delete key to wade through the morning's spam.
