Google has announced an interesting new service, the inactive account manager.  Google users can register with the service, and it will automatically send email to up to 10 addresses, after an account becomes totally inactive for a designed amount of time:

http://www.theatlantic.com/technology/archive/2013/04/google-death-a-tool-to-take-care-of-your-gmail-when-youre-gone/274934/

http://googlepublicpolicy.blogspot.com/2013/04/plan-your-digital-afterlife-with.html

Looks like a great outreach tool for use with potential donors who are not quite ready to share their digital stuff with an archives.  All you need to do is talk people into listing your archives email account as a contact!