I am have recently created a website, where users can supply their email to receive mock programming briefs, once a day, for 32 days.
Here's some more information on the service:
I store the users email address and a record indicating which brief they are scheduled to next receive.
The server holding this information, and sending the emails, is hosted by Heroku. I have selected to use European servers to host the project, but I do not know if there is the potential for American servers to be used instead.
The information is stored volatile, meaning that in the event of a server shut down all currently stored records are lost.
At the end of the 32 days, the email address is removed from the database. However, I have also made a mechanism for removing a users address available, which would immediately remove a supplied address from the list.
At no point do I make any gain (financial or otherwise) from the service, nor advertise or send any other email to the user other than those 32 briefs.