Re: [idn] Some comments

["D. J. Bernstein" <djb@cr.yp.to>]

Sorry to bother you with facts, Dave, but Sendmail has done just-send-8
by default for 8-bit non-MIME messages since version 6.57 in 1993. This
blatantly violates RFC 1652 and the 7-bit restriction in RFC 821.

As for MIME messages, current versions of Sendmail can convert 8-bit to
Quoted-Printable, but there's a popular ``8 flag'' that turns this off,
again in violation of RFC 1652 and RFC 821.

Of course, qmail has always done just-send-8 for all messages. It also
deliberately announces 8BITMIME to subvert Sendmail's Quoted-Printable
conversion. Yes, this violates RFC 1652, but it's exactly the same as
the behavior of many Sendmail installations. (It's what the users want!)

Similarly, Exim does just-send-8 for all messages. It announces 8BITMIME
if you set the accept_8bitmime option.

---Dan