From nicholas.cole at gmail.com  Fri Aug 28 02:25:12 2009
From: nicholas.cole at gmail.com (Nicholas Cole)
Date: Thu, 27 Aug 2009 20:25:12 -0400
Subject: [Email-SIG] Ensuring 7 bit encoding
Message-ID: <a5c3d8350908271725y3be209ffhc65ab1e731cf7878@mail.gmail.com>

I hope that this question has a trivial answer, but that people won't
mind me asking it here. I've been googling the subject, but can't
quite get a handle on it.

What do I need to do to ensure that emails are generated only in 7,
not 8-bit encodings?  I assume that I need to use
email.charset.add_charset , but can't quite work out what incantation
to give it.  Does anyone have any pointers?

Best wishes,

Nicholas

From mark at msapiro.net  Fri Aug 28 02:42:05 2009
From: mark at msapiro.net (Mark Sapiro)
Date: Thu, 27 Aug 2009 17:42:05 -0700
Subject: [Email-SIG] Ensuring 7 bit encoding
In-Reply-To: <a5c3d8350908271725y3be209ffhc65ab1e731cf7878@mail.gmail.com>
Message-ID: <PC19220090827174205045388994d8a@msapiro>

Nicholas Cole wrote:
>
>What do I need to do to ensure that emails are generated only in 7,
>not 8-bit encodings?  I assume that I need to use
>email.charset.add_charset , but can't quite work out what incantation
>to give it.  Does anyone have any pointers?


I'm not sure what it is you're asking. Does this answer your question?

>>> import email.message
>>> m = email.message.Message()
>>> m.set_payload("""A few lines
... of 7-bit text
...
... No high bit characters.
... """, 'us-ascii')
>>> print m.as_string()
MIME-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: 7bit

A few lines
of 7-bit text

No high bit characters.

>>>


-- 
Mark Sapiro <mark at msapiro.net>        The highway is for gamblers,
San Francisco Bay Area, California    better use your sense - B. Dylan


From rdmurray at bitdance.com  Fri Aug 28 03:45:39 2009
From: rdmurray at bitdance.com (R. David Murray)
Date: Thu, 27 Aug 2009 21:45:39 -0400 (EDT)
Subject: [Email-SIG] Ensuring 7 bit encoding
In-Reply-To: <PC19220090827174205045388994d8a@msapiro>
References: <PC19220090827174205045388994d8a@msapiro>
Message-ID: <Pine.LNX.4.64.0908272050040.30683@kimball.webabinitio.net>

On Thu, 27 Aug 2009 at 17:42, Mark Sapiro wrote:
> Nicholas Cole wrote:
>>
>> What do I need to do to ensure that emails are generated only in 7,
>> not 8-bit encodings?  I assume that I need to use
>> email.charset.add_charset , but can't quite work out what incantation
>> to give it.  Does anyone have any pointers?
>
>
> I'm not sure what it is you're asking. Does this answer your question?
>
>>>> import email.message
>>>> m = email.message.Message()
>>>> m.set_payload("""A few lines
> ... of 7-bit text
> ...
> ... No high bit characters.
> ... """, 'us-ascii')
>>>> print m.as_string()
> MIME-Version: 1.0
> Content-Type: text/plain; charset="us-ascii"
> Content-Transfer-Encoding: 7bit
>
> A few lines
> of 7-bit text
>
> No high bit characters.
>
>>>>

It probably doesn't, since if that message contains high range
characters it will result in an encoding of 8bit:

>>> import email.message
>>> m = email.message.Message()
>>> m.set_payload("""A few lines
... of 8-bit text
...
... One high bit character: ??.
... """, 'us-ascii')
>>> print m.as_string()
MIME-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: 8bit

A few lines
of 8-bit text

One high bit character: ??.

>>>

Since 8bit isn't technically us-ascii, I wonder if this is a bug.

With a little experiement and a look at the code, it appears that you
will get 7bit clean output as long as you always provide a charset
for the input other than us-ascii that the charset module has been
told should be encoded using QP or BASE64 (which is true for
all of the already registered charsets).

EG: this results in 7bit clean output:

i>>> import email.message
>>> m = email.message.Message()
>>> m.set_payload("""A few lines
... of 8-bit text
...
... One high bit character: ??.
... """, 'latin-1')
>>> print m.as_string()
MIME-Version: 1.0
Content-Type: text/plain; charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable

A few lines
of 8-bit text

One high bit character: =C2=B2.

>>>

I suspect this is not a complete answer to the question...

--David

From stephen at xemacs.org  Fri Aug 28 08:05:51 2009
From: stephen at xemacs.org (Stephen J. Turnbull)
Date: Fri, 28 Aug 2009 15:05:51 +0900
Subject: [Email-SIG] Ensuring 7 bit encoding
In-Reply-To: <Pine.LNX.4.64.0908272050040.30683@kimball.webabinitio.net>
References: <PC19220090827174205045388994d8a@msapiro>
	<Pine.LNX.4.64.0908272050040.30683@kimball.webabinitio.net>
Message-ID: <8763c81ni8.fsf@uwakimon.sk.tsukuba.ac.jp>

R. David Murray writes:

 > >>> import email.message
 > >>> m = email.message.Message()
 > >>> m.set_payload("""A few lines
 > ... of 8-bit text
 > ...
 > ... One high bit character: ??.
 > ... """, 'us-ascii')
 > >>> print m.as_string()
 > MIME-Version: 1.0
 > Content-Type: text/plain; charset="us-ascii"
 > Content-Transfer-Encoding: 8bit
 > 
 > A few lines
 > of 8-bit text
 > 
 > One high bit character: ??.
 > 
 > >>>
 > 
 > Since 8bit isn't technically us-ascii, I wonder if this is a bug.

This is a bug.


From MichaelL at vulcan.com  Tue Aug 18 18:07:35 2009
From: MichaelL at vulcan.com (Michael Lesauis)
Date: Tue, 18 Aug 2009 16:07:35 -0000
Subject: [Email-SIG] header info in body of message.  is this normal?  EOM
Message-ID: <CC28F43ED4708D489ABCF68D06D7F5560300DDFE73@505DENALI.corp.vnw.com>




Michael Lesauis, Lab Manager
Vulcan Inc.
(c) 206-499-1037, (d) 206-342-2189

It takes each of us to make a difference for all of us.  ~ Mutcheson