Excuse me if this has been noted before. I just joined the list today, and 
could not find this discussed in the last 3 months of archives, although there 
were some similar.

Observation: The same signed mail (sent from Apple Mail 4.4) to Gmail, Mobile 
Me and my own server, arrives unscathed at two of them all the time and some of 
the time via me.com.

I'm therefore pretty sure the problem is Apple's but I'd like to confirm my 
hypothesis before I log a bug with them.

Messages that fail to validate appear to have a few strings UPCASED inside what 
I think is the boundary of the signed message part (That's what I am asking to 
get confirmed.)

I threw the raw text of what came back to me from my .me and gmail accounts 
from a signed test message I sent from my own server at Emac's EDIFF.

Here's what .me gave me
________________________________
Date: Thu, 03 Mar 2011 15:58:37 +0000
Message-id: <[email protected]>
To: Elliott Roper <[email protected]>,
 Elliott Roper <[email protected]>
MIME-version: 1.0 (Apple Message framework v1082)
Content-transfer-encoding: 7bit
X-Pgp-Agent: GPGMail 1.3.2
X-Mailer: Apple Mail (2.1082)


--Apple-Mail-11-885654614
Content-Type: multipart/MIXED;
        boundary=Apple-Mail-10-885654566


--Apple-Mail-10-885654566
Content-Transfer-Encoding: 7BIT
Content-Type: TEXT/PLAIN;
        charset=us-ascii

1558

--Apple-Mail-10-885654566
Content-Disposition: INLINE;
        filename="Emacs NEWS.23.1 snippet.jpg"
Content-Type: IMAGE/JPG;
        x-unix-mode=0644;
        x-mac-type=4A504547;
        x-mac-creator=474B4F4E;
        name="Emacs NEWS.23.1 snippet.jpg"
Content-Transfer-Encoding: BASE64

/9j/4AAQSkZJRgABAQEASABIAAD//gAMQXBwbGVNYXJrCv/bAIQAAgICAgICAgICAgMCAgMDBQQD
AwMDBgUFBAUHBggHBwYHBwgJCwoICAsIBwcKDQoLCwwMDQwICQ4ODQwOCwwMDAECAwMDAwMGBAQG

...etc
____________________________________________________________________

and this is what came back from gmail.

__________________________________________________________________
Date: Thu, 3 Mar 2011 15:58:37 +0000
Message-Id: <[email protected]>
To: Elliott Roper <[email protected]>,
 Elliott Roper <[email protected]>
Mime-Version: 1.0 (Apple Message framework v1082)
Content-Transfer-Encoding: 7bit
X-Pgp-Agent: GPGMail 1.3.2
X-Mailer: Apple Mail (2.1082)

This is an OpenPGP/MIME signed message (RFC 2440 and 3156)
--Apple-Mail-11-885654614
Content-Type: multipart/mixed; boundary=Apple-Mail-10-885654566


--Apple-Mail-10-885654566
Content-Transfer-Encoding: 7bit
Content-Type: text/plain;
        charset=us-ascii

1558

--Apple-Mail-10-885654566
Content-Disposition: inline;
        filename="Emacs NEWS.23.1 snippet.jpg"
Content-Type: image/jpg;
        x-mac-type=4A504547;
        x-mac-creator=474B4F4E;
        x-unix-mode=0644;
        name="Emacs NEWS.23.1 snippet.jpg"
Content-Transfer-Encoding: base64

/9j/4AAQSkZJRgABAQEASABIAAD//gAMQXBwbGVNYXJrCv/bAIQAAgICAgICAgICAgMCAgMDBQQD

...usw
____________________________________________________________________________

What I'm after getting confirmed is that the line
--Apple-Mail-10-885654566
is the start of the signed region, and that mobile me's server was naughty 
uppercasing 7BIT, TEXT/PLAIN and BASE64


Elliott Roper
phone: +44 1663 747334
mobile +44 7796 171018
www.yrl.co.uk



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