I'm looking for a way to programmatically manage email lists and send large numbers of emails to these lists. The general idea would be similar to how social networking sites send email notifications when a friend posts new content. Since a user could have tens of thousands of followers, it doesn't seem realistic to send these directly from my application so I'm curious if there's a good way to handle this through a service provider. My company is using Google apps but I'm not an expert on their API. Our environment is ASP.NET MVC.

Any advice is most appreciated!