The White House has now come out and said yes, SPAM was sent from our server, but it isn't our fault, blaming the SPAM on people (or action groups) who went to the Government site and put people on the White House list without their permission. (see full story at: http://www.foxnews.com/politics/2009/08/17/questions-remain-unsolicited-white-house-e-mails/)
What is really comes down to is, as I stated in my last post, the opt in/confirmation process. If the White House was using a reputable provider for their email services, like Fat Atom, they would know that there is a process to go through to verify the actual email address inputted was done by the email address owner. This isn't rocket science, but it was overlooked by the administration and their current ESP.
A great lesson to learn the hard way!