Non-ASCII chars in MAIL FROM envelope

[Kjetil Torgrim Homme]

On Wed, 2008-02-13 at 20:29 +1100, Rob Mueller wrote:
> > Yes, but that will block possibly valid mail. Of course I don't accept
> > mail with non-ASCII RCPT TO addresses because Cyrus doesn't allow it, but
> > I should accept non-ASCII MAIL FROM addresses if they are valid. But Cyrus
> > also refuses them. That's the real problem.
> 
> Can you turn off the 8BITMIME extension that postfix advertises? It seems 
> from the RFC (http://tools.ietf.org/html/rfc4952), if 8BITMIME isn't 
> advertised, then it's up to the sending side to downgrade the SMTP 
> transaction to ASCII, and then you could block non-ASCII MAIL FROM 
> addresses...

8BITMIME is only for DATA.  to use UTF-8 in e-mail addresses, you need
to support the UTF8SMTP SMTP extension, which still hasn't been
finalised.  allowing UTF8 in the envelope is quite premature...

-- 
best wishes,
Kjetil T.