Microsoft KB Archive/161943

= XFOR: RFC822 Header Includes BCC Recipients Fields =

Article ID: 161943

Article Last Modified on 10/28/2006

-

APPLIES TO


 * Microsoft Exchange Server 4.0 Standard Edition
 * Microsoft Windows NT 4.0
 * Microsoft Windows 95

-



This article was previously published under Q161943



SYMPTOMS
The Microsoft Internet Mail Service for Windows 95 and Windows NT Server improperly sends the BCC recipients information in the RFC-822 header of the mail message. This causes all recipients of the message to see who was BCC'd on the mail message.



STATUS
Microsoft has confirmed this to be a problem in Microsoft Exchange Server version 4.0. This problem was corrected in the latest Microsoft Exchange 4.0 U.S. Service Pack. 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



MORE INFORMATION
RFC-822 states the following about the BCC field:

This field contains the identity of additional recipients of the

message. The contents of this field are not included in copies of the

message sent to the primary and secondary recipients.

The following is a sample network monitor trace:   SMTP: Rsp: Service ready, 93 bytes SMTP: Cmd: Hello, host identifier, 28 bytes SMTP: Rsp: Requested mail action okay, completed, 69 bytes SMTP: Cmd: Mail from , 22 bytes SMTP: Rsp: Requested mail action okay, completed, 29 bytes SMTP: Cmd: Recipient , 33 bytes SMTP: Rsp: Requested mail action okay, completed, 45 bytes SMTP: Cmd: Recipient , 31 bytes SMTP: Rsp: Requested mail action okay, completed, 43 bytes SMTP: Cmd: Data: Mail data to follow, 6 bytes SMTP: Rsp: Enter mail ..., 50 bytes SMTP: Data - continued from frame 16, 480 bytes SMTP: Data = Received: by test.microsoft.com with Microsoft Mail SMTP: Data = id <01BC18F8.ED1DCB00@test.microsoft.com>; SMTP: Data = Message-ID: <01BC18F8.ED1DCB00@test.microsoft.com> SMTP: Data = From: Test SMTP: Data = To: "test@microsoft.com'"  SMTP: Data = Bcc: "test@microsoft.com'"  SMTP: Data = Subject: SMTP: Data = Date: Wed, 12 Feb 1997 15:23:47 -0800 SMTP: Data = MIME-Version: 1.0 SMTP: Data = Content-Type: text/plain; charset="us-ascii" SMTP: Data = Content-Transfer-Encoding: 7bit

Keywords: kbbug kbfix kbusage KB161943

-

[mailto:TECHNET@MICROSOFT.COM Send feedback to Microsoft]

© Microsoft Corporation. All rights reserved.