You can arrange to receive an email when someone posts a new topic on a board, or when someone replies to a message in a topic. To set up email notification, select the 'Notify' option at the top of a board or topic.
You can also set up a notification for a topic by using the 'Additional options' link and checking the 'Notify me of replies' box before you reply to a message.

You can manage your notifications from your profile by following the 'Notifications and email' link (you can also set several notification preferences here).

Does an email notification contain the whole message?
Yes. But you can receive just a link to the message if you prefer. This option is set from your profile.
Can I post or reply by email?
Not at present. This may be introduced in the future.
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