An update/review campaign is created by a site administrator, and is based on several criteria : no update during a timeframe, authors to retrieved in the last n versions of the page, labels linked to pages to exclude them of the campaign.
During the creation process, a consent can be given to retrieve all emails of the contributor users implied in the campaign. With this, the campaign creator will have the complete lists of email addresses to include in his communication
Note : all the email addresses retrieved are not stored after the campaign creation is done.
The campaign creator can see figures about the progress of campaigns.