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Bill McQuillan | 1 Sep 2006 10:00
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Re: [EAI] Comments on draft-ietf-eai-utf8headers-01.txt


On Thu, 2006-08-31, Charles Lindsey wrote:
> 3.  Terminology

>     In this document, header fields are "UTF-8 header" if the bodies of

> s/"UTF-8 header"/"UTF-8 headers"/

Please let's not spread the "header fields" = "headers" pollution of the standard email terminology!

A message/rfc822 contains a single "header" made up of "header fields". The fact that we might extend this
to "UTF-8 header" shouldn't change the usage. 

[Note that a MIME multipart message MAY have multiple (MIME) "headers" in the body, each made up of (MIME)
"header fields."]

--

-- 
Bill McQuillan <McQuilWP <at> pobox.com>
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Charles Lindsey | 4 Sep 2006 21:21
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[EAI] Comments on draft-ietf-eai-downgrade-02

s/EAI/UTF8SMTP/ throughout the document, including in the title.

1.  Introduction

    Traditional mail systems which are defined by [RFC2821] and [RFC2822]
    allow US-ASCII characters in SMTP envelope and mail headers in body
    part.  The EAI proposal [I-D.ietf-eai-framework],
    [I-D.ietf-eai-utf8headers] and [I-D.ietf-eai-smtpext] allows UTF-8
    characters in SMTP envelope and mail headers in body part.

s/mail headers in body part/mail header field bodies/ (twice)

otherwise, people will think you are talking about headers inside the  
<body>s of mail messages. "field body" is the term RFC 2822 uses for a  
header field without its header name.

    ... Not only
    SMTP envelope, but also UTF-8 characters in mail headers MUST be
    converted to US-ASCII.

s/mail headers/mail header fields/ here and in lots of other places, to  
accord with the terminology of RFC 2822.

And then s/mail header fields/mail header fields and in the headers fields  
of MIME multipart and message types/.

Otherwise, an already downgraded message will get munged if it then  
encounters a non-8BITMIME server.

    In this document, requirements for downgrading is described in
(Continue reading)

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Kari Hurtta | 1 Oct 2006 08:00
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[EAI] smtp MAIL FROM dowgrading


One method for smtp
    MAIL FROM:<utf-8-address>

downgrading is use similar trick what SPF uses for
it's forwarding problem. For SPF that is SRS
(Sender Rewriting Scheme).

So when  mail with
    MAIL FROM:<utf-8-address>

need to go to next smtp hop which do not support UTF8SMTP
it can be similarry replaced with

    MAIL FROM:<hash <at> converting-smtp-host>

and then maintain that bounces and DSNes with

    MAIL FROM:<>
    RCPT TO:<hash <at> converting-smtp-host>

are forwarded as

    RCPT TO:<utf-8-address>

for one month time.

That have same problems than SRS that it is not
used as involuntary relay, but if SRS can be used
then that also is possible.
(Continue reading)

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