The Notification Emails article has the most up-to-date information on this topic.
In the Profile area, there are three types of email notification settings.
Crawl Finished Emails
These are emails you receive when a crawl being run on your site is finished. There are settings for the frequency of Delivery.
There is also an option to select which sites you want to receive emails about completed crawls.
Page Set Score Emails
You have an option to receive weekly emails about scores per Page Set.
Task Emails
Finally, you can view emails about tasks you created and/or are assigned to, as well as emails in which you have been mentioned.