Custom recipients (CRs) that are members of Microsoft Exchange
Distribution Lists (DLs) and use POP3 clients, may not receive attachments
when messages are sent to the DL.
CCMAIL users who are SMTP custom recipients may receive the attachment as
a base64 file called Mime6.raw.
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When the DL is created, the default property for the DL is to Allow Rich
Text and this is inherited by all members of this DL.
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Microsoft has confirmed this to be a problem in Microsoft Exchange Server
version 5.0. This problem has been corrected in the latest U.S. Service
Pack for Microsoft Exchange Server version 5.0. For information on
obtaining the service pack, query on the following word in the Microsoft
Knowledge Base (without the spaces):
S E R V P A C K
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The property to Allow Rich Text is set for Microsoft Exchange Recipients
and DLs automatically. This property is not set for CR. However, if the CR
is part of a DL, the CR inherits this property from the DL as it is
expanded. With this Allow Rich Text property set, the IMS will send out
message with Transport Neutral Encoding Format (TNEF) attachments and most
POP3 clients cannot read this format.
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