Supporting Messaging Clients

Set Per-User Options

In some situations you may need to override server defaults for specific clients. For example, the majority of your POP3 clients can interpret HTML, so you set the server to provide message bodies in HTML by default. However, there are a few clients that use the POP3 server but cannot interpret HTML. To provide plain text messages for those clients, you can override the MIME encoding set on the server. Overriding server defaults at the user level allows you to support clients with different needs that are accessing the same POP3 virtual server.

Note   You can also create additional virtual servers on a single computer to provide administration for a number of different messaging scenarios. This solution may be best suited for organizations that have a large number of clients with varying needs.

To set per-user options:

  1. Start Active Directory Users and Computers
    on the Start menu, point to Programs, point to Administrative Tools, and then click Active Directory Users and Computers.


  2. Tip  If Active Directory Users and Computers doesn't appear on the Administrative tools menu, on the Start menu, click Run, type dsa.msc, and then click OK.

  3. From the View menu, click Advanced Features.
  4. In the console tree, click Users.
  5. In the details pane, right-click a mailbox-enabled user, and then click Properties.
  6. Open Exchange Advanced, and then click Protocol Settings.
  7. Click POP3, and then click Settings.
  8. Click Use protocol defaults to clear the check box and configure client settings.
  9. You can override the following server settings for the specific user:
  10. Setting Description
    MIME Encoding MIME provides a way to describe a message consisting of different parts. Options include:
    • Provide message body as plain text.
    • Provide message body as HTML.
    • Both.
    uuencode UNIX to UNIX encoding (uuencode) converts a binary file into printable 7-bit ASCII characters without loss of information.
    Default character set If multiple character sets can be used to convert a message, a default character set is used.

    Note   Early MAPI clients, such as Outlook 97, do not allow the user to specify a character set. It is for these clients only that the character set conversion settings apply.
    Use Exchange Rich Text Format If enabled, POP3 clients receive messages in Exchange RTF. Although all POP3 clients receive the information as an attachment, the attachment is opened and displayed as a normal message for POP3 clients that can interpret Exchange rich-text format. For POP3 clients that cannot interpret Exchange rich-text format, an attachment is displayed.
  11. In POP3 Protocol Details, click OK, and then in Protocols, click OK.