> >  Mutt doesnt ask for it - and postfix / exim / qmail dont implement DSN at all
> 
> Postfix now supports DNS:
> 
>       Major changes with snapshot-20000924
>       ====================================
> 
>       DSN formatted bounced/delayed mail notifications, finally.  The
>       human-readable text still exists, so that users will not have to
>       be unnecessarily confused by all the ugliness of RFC 1894.

 Postfix does _not_ support DSN. The ChangeLog above is about DNS-like
 formatting of notification messages!

 To support DSN, an internal protocol and interface redesign is necessary.
 This is not going to happen anytime soon.

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