John C Klensin wrote (2007-07-17): > Arnt Gulbrandsen <[EMAIL PROTECTED]> wrote: >> >> My code to implement this does >> >> if all rejected >> answer "CR LF . CR LF" with 5xx >> else if all accepted >> 2xx >> else >> 2xx, and send a DSN with the exact details >> >> The third case is very, very uncommon in practice, so I'm not >> all that worried by its ill effects. > yep. It is also no worse than "accept everything, send DSNs as > needed later" which, for better or worse, 2821 explicitly > contemplates.
BTW, while I'm still catching up with old messages: The BSI, a federal agency for IT security in Germany, allegedly recommends that all federal organizations in Germany cease to send NDRs, ignoring RFC 2821 for better or worse: <http://www.heise.de/ix/news/meldung/96350> (German article) <http://purl.net/net/de2en/heise.de/ix/news/meldung/print/96350> The second link is a crude translation provided by Google. Frank
