One that piqued the interest of Fred Tabsharani, vice president of marketing at Port25 Solutions, and others was which commercial MTA (message transfer agent) -- an outbound message gateway that delivers outbound messaging as well as providing detail on inbound messages -- the Obama campaign used for its emailing efforts.
Tabsharani wrote about Geer's talk: "What an opportunity for the Summit to congregate and listen to the strategies employed by the Obama campaign in detail. Geer spoke of 'unbridled segmentation' and unheard-of frequency models to achieve fundraising goals. However, when it came to deliverability, Stephen said that there were challenges based on the sheer volume of emails deployed ... but he seemingly shied away from answering detailed questions about deliverability."
Tabsharani said he asked Geer which commercial MTA product the campaign used, but Geer said he couldn't answer based on sensitivity issues.
Tabsharani asked that if anyone has any thoughts on why the issue may be proprietary and/or about which MTA was indeed used, please email him at ftabsharani@port25.com -- or respond to this post.