IMAP client limitations

Folder limitations

The following restrictions apply to folders used with IMAP:

• A single folder name cannot exceed 64 bytes.
• An unlimited number of nested folders is allowed, but the combined length of all nested folder names (including delimiters) cannot exceed 129 bytes.

View limitations

The service provides IMAP clients access to folders in user mail files but not to views. The Drafts, Sent, and Trash views in mail files therefore are not available through IMAP clients. To work around this limitation, IMAP client users can create folders that correspond to these views and put messages in the folders instead. IBM® Notes or web client users must open these folders to see the messages in them.

Return receipt

The service does not support the use of return receipts with IMAP clients. If you request a return receipt and the recipient opens the message using the IBM Notes or web client, no return receipt is generated.

Login limitations

For security reasons, your administrator might enable IP address restrictions that require you to log in from computers that are within your company network. If you cannot log in to the service from a computer outside your company network, check with your administrator to see if IP address restrictions are the reason.