You can choose the way you want to receive discussion messages to fit your working patterns.
To configure the way you receive messages, follow these steps:
Note: You must have the Discussions - Discussion View permission to receive messages.
Note: User groups and other discussions can be subscribed to a discussion only through the message-by-message or digest-only subscription modes. When a user group and or another discussion has been subscribed to a discussion, the members of the group or discussion will receive email notification regardless of the permission they hold.
Note: The most recently received messages (from the past 48 hours, by default) are displayed on your My Start page flagged "Recent" against the discussion.