Contact the author of an advertisement originated in a particular portal. The author will then receive a server-generated email (or other type of message) from this portal.
The email will contain all required information so that the author can reply the requester with specifics about his ad or potentially with his contact data.
Import an advertisement into an ad portal.
Remove a foreign advertisement (i.e. one, that has been imported from another advertisement portal) from the database.
Remove all foreign advertisement, which have been imported from another advertisement portal, from the database.