Settings of the Message boards module are located in Site Manager -> Settings -> Community -> Message boards. Among other community-related settings, the following settings are related to the Message boards module:
•Send message board e-mails from - e-mail address that will appear in the From field of notification messages about new message board messages.
•Board base URL - global board base URL that can be inherited by message boards; it can be used by board notification e-mails and message board viewers.
•Board unsubscription URL - URL of the site on which the Message board unsubscription web part is placed; this web part handles requests for unsubscription from notifications about new message board messages.
•Enable double opt-in for message boards - indicates if double opt-in should be enabled for message boards. When enabled, users are required to confirm their subscription by clicking a link that is sent to them in an e-mail.
•Double opt-in approval page path - path to the page that contains the Message board subscription confirmation web part. The subscription confirmation link that will be sent to users will point to this page.
•Double opt-in interval (hours) - amount of time in hours, during which a user has to confirm their subscription request.
•Send double opt-in confirmation - indicates if an e-mail confirmation should be sent to user after they approve a subscription. If double opt-in is disabled, these confirmation e-mails are always sent.