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Exchange Server Active Sync - character encoding issues

I'm using an iPhone 3GS with an Exchange Server 2003 backend. On the iPhone, in the inbox view (small preview of every mail), the mail looks fine. As soon as I enter the mail, all special (non-ASCII) characters look broken.

To give an example: In the "list of e-mails" view, "äöü" in the mail body looks like "äöü" in the small preview. As soon as I enter the mail, the mail body looks like "äöü".

It's not a problem with the mails themselves: I've tried it with utf-8 encoded mails as well as with iso-8859-1 mails: Both look fine in Outlook, in IMAP clients (Thunderbird, Alpine, ...) and in Outlook Web Access. It's just the iPhone mail application that displays the non-ASCII characters incorrectly, and it only does that when looking at the full mail, not in the preview.

(Technical: On byte level, "ä"(UTF-8) = "ä"(ISO-8859-1) = C3 A4. So to me, it looks like the iPhone gets a correct UTF-8 stream from Exchange (independent of the encoding of the original mail) and then -- for some strange reason -- interprets this UTF-8 stream as ISO-8859-1.)

iPhone 3G S, iPhone OS 3.1.2

Posted on Dec 27, 2009 3:39 PM

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10 replies

Dec 27, 2009 4:16 PM in response to Heinzi

I did some more testing and would like to add two things:

1. The problem only occurs on messages with "Content-Transfer-Encoding: 8bit". BASE64-encoded messages are fine.

2. I found an old newsgroup thread related to this problem, unfortunately without a conclusion: http://groups.google.com/group/microsoft.public.exchange.admin/browse_thread/thr ead/766d7d5275ca0005/cdea185b59c55d19

Dec 29, 2009 3:40 PM in response to Heinzi

Hi
I have the same problem, id did use Iphone 3G and there was no problem.
Did buy this phone(3Gs) in last week, and got this problem.
I have tryed to get support on this but everybody tells be to talk whit my operator. But the can not... and tryed to call Apple in Sweden but all answering machine say no support talk to operator...

I was werry happy when i find this i think the problem is soft in 3GS dont uncode "iso-8859-1" right- Everything whit ÅÄÖ dont work only when you look in the small preview it works
/Anders

Message was edited by: Sixxnikki

Message was edited by: Sixxnikki

Jan 18, 2010 6:43 AM in response to Heinzi

hi,

any progress yet?

We have the same problem with Exchange 2003 and came to the same conclusion that it only occurs in plain text messages with Content-Transfer-Encoding: 8bit.

The interesting fact is, that this problem doesn't occur in a partner company with Exchange 2007.

Tested with Iphone OS 3.0 and 3.1.2

A similar problem with äöü in the sender's name could be resolved with an Windows Registry entry.

Feb 2, 2010 8:32 AM in response to Heinzi

I'm also experiencing this problem. I'm using Google Apps/Gmail via the Exchange protocol. Google Apps/Gmail via IMAP does not have this problem so it has something to do with the Exchange protocol in combination with iPhone mail.

I've found that Swedish characters get garbled when using 8bit content transfer encoding regardless of the character set, utf-8 and latin-1 is just the same.

But to me it doesn't look like the utf-8 data is displayed as latin-1 charactes. Instead all Swedish characters (å ä ö) looks like this: �

A partial workaround for me was to change default content transfer encoding to quoted printable in my other e-mail client. Doesn't help for incoming e-mails though.

Exchange Server Active Sync - character encoding issues

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