KB195215 - XFOR: 8-Bit Data Is Put in the Message Body When Internet Mail Service Is Configured for UUENCODE and US-ASCII Charset

Article ID: 195215

Article Last Modified on 10/28/2006

Microsoft Exchange Server 5.0 Standard Edition
Microsoft Exchange Server 5.5 Standard Edition

This article was previously published under Q195215

SYMPTOMS

Outbound SMTP messages from the Internet Mail Service may contain 8-bit data in the message body, even though the Internet Mail Service is configured to use UUENCODE and the US-ASCII character set.

CAUSE

The 8-bit data should be mapped to the 7-bit equivalents. Outlook 98 introduces a property that incorrectly signals the Internet Mail Service to use the ISO8859-1 character set, instead of US-ASCII.

RESOLUTION

To resolve this problem, obtain the latest service pack for Exchange Server version 5.5. For more information, please see the following article in the Microsoft Knowledge Base:

191014 XGEN: How to Obtain the Latest Exchange Server 5.5 Service Pack

The English version of this fix should have the following file attributes or later:

   Component: Store

   File Name      Version
   -------------------------
   Store.exe    5.5.2438.0
   Mdbmsg.dll   5.5.2438.0
   Gapi32.dll   5.5.2438.0

   Store.exe    5.0.1461.75
   Mdbmsg.dll   5.0.1461.75

STATUS

Microsoft has confirmed this to be a problem in Microsoft Exchange Server versions 5.0 and 5.5.

MORE INFORMATION

The Internet Mail Service will encode outbound mail according to the following criterion:

If the Internet Mail Service is configured as MIME, the Internet Mail Service encodes the 8-bit data in either base64 or quoted printable.
If the Internet Mail Service is configured to send UUENCODE and the outbound character set specified is US-ASCII, then the Internet Mail Service will take the 8-bit data and match it to the closest 7-bit equivalent.
If the Internet Mail Service is configured to send UUENCODE with the outbound character set specified as ISO-8859-1, then the 8-bit data should be left in the body of the message.

Keywords: kbhotfixserver kbqfe kbbug kbfix kbqfe KB195215