Enabling the IMAP service to automatically display all accessible mail folders

The Domino® IMAP service complies with RFC 2342, which defines a method by which the IMAP service automatically presents a client with a list of all mail files to which the current user has access

About this task

The list of all mail files to which the current user has access, include the following:

  • The user's personal mail file
  • Other users' personal mail files to which the user has been delegated access
  • Public mail files, such as mail-in databases, to which the user has access, and which are set up as IMAP public folders.

To provide IMAP users with access to other users' mail files, you must use a Notes® client or iNotes® client to delegate mail file access. It is not sufficient to add the names of users to the ACL of the mail file.

Enabling clients that do not support the NAMESPACE extension to access shared folders

About this task

By default, only IMAP clients that support the NAMESPACE extension can display mail files other than the user's personal mail file. However, you can configure the IMAP service so that it presents public and others users' folders even if the user's IMAP client does not have built-in NAMESPACE support. Configured in this way, the IMAP service always returns to the client the complete range of mail folders to which the current user has access.

To enable IMAP NAMESPACE support on the server


  1. Make sure you already have a Configuration Settings document for the server(s) to be configured.
  2. From the Domino® Administrator, click the Configuration tab and expand the Messaging section.
  3. Click Configurations.
  4. Select the Configuration Settings document for the mail server or servers you want to administer, and click Edit Configuration.
  5. Click the IMAP > Public and Other Users' Folders tab.
  6. In the Basics section, complete the following field and then click Save & Close:
    Table 1. Basics tab fields



    Public and other users' folders support

    Choose one:

    • Enabled - (default) In addition to presenting an IMAP client with the current user's mail folder, the IMAP service also presents any public folders and other users' mail files that the current user has access to.
    • Disabled - The IMAP service does not present IMAP clients with public and other users' mail folders. The IMAP client can access the current user's personal mail file only.

    Include all public and other users' folders when a folder list is requested

    Choose one:

    • Enabled - The IMAP service always displays all available folders to the connecting client.
    • Disabled - (default) The IMAP service displays available folders in the Other users' and Public namespaces only to clients that request them using the NAMESPACE command. If a client does not support the NAMESPACE command, the IMAP service presents to it the current user's personal mail folder only.
    Note: This field is not available if Public and other users' folders support is set to Disabled.

What to do next

Changes take effect after the next IMAP update interval. Sessions that begin after the updated settings take effect use the updated settings. However, existing sessions continue to use the settings that were in effect when the session started.

To force an immediate update, restart the IMAP service.