Re: First strawman for UTF-8 headers proposal

On 2003-11-26 10:57:57 -0800, Paul Hoffman / IMC wrote:

> - If a receiving SMTP server does not support UTF-8-HEADERS, the
> sending SMTP client downgrades all headers and continues to send
> the message.

...

> - If the initiator knows the mapping for any recipient (through caching
> or an address book), they SHOULD put it in the map header. If they
> don't include a mapping and the message hits a non-UTF-8-HEADERS
> SMTP server, the message will bounce.

What happens to the envelope?  I'm reading the current proposal to
mean that mail transfer agents would have to rewrite the envelope
based on parsing the address-map header in the message, and bounce
if no address-map is present.

What to do about BCCs, then?  Adapted mapping headers for each
instance, in order to avoid information leakage?


I'm also having some doubts about what will happen when messages are
sent to mixed universe (utf8/non-utf8) recipient set (or are
automatically bounced to systems outside utf8 universe; think
webmail systems).  I'll try to elaborate on this later today.


Regards,
-- 
Thomas Roessler · Personal soap box at <http://log.does-not-exist.org/>.