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A small text file attachment (140 characters or fewer) containing line-feed<LF> characters, but no carriage-return line-feed combinations <CR><LF>,will be modified during outbound delivery of the Internet Mail Service. Themodification will be the extra insertion of a <CR><LF> just after theoriginal <LF> character, resulting in a <LF><CR><LF> combination at the endof each line. This may cause problems for the receiving system.
A logic error treats the text file attachment as a text/plain body partwith 7-bit encoding. Larger attachments (those greater than 140characters), are being encoded as Quoted-Printable, which correctlypreserves the <LF> character sequences.
To resolve this problem, obtain the latest service pack for Exchange Serverversion 5.5. For more information, please see the following article in theMicrosoft Knowledge Base:
191014XGEN: How to Obtain the Latest Exchange Server 5.5 Service Pack
Exchange Server 5.0
Microsoft has confirmed this to be a problem in Microsoft Exchange Serverversion 5.0.
A supported fix is now available, but has not been fully regression-testedand should be applied only to systems experiencing this specific problem.Unless you are severely impacted by this specific problem, Microsoftrecommends that you wait for the next service pack that contains this fix.Contact Microsoft Technical Support for more information.
This fix has been posted to the following Internet location: