In a totally Comcastic move, Comcast recently released a handy chart to explain why your batch email sends might not be getting through the door of their mail servers.Essentially, they count how many emails you are in process of sending and then do a SenderScore.org lookup to determine if your SS rating is sufficient enough to be sending the amount of emails you are.
If your score is not sufficient they recommend changing your delivery throttling. Which is very easy to do with the ExactTarget Email Marketing Application.
Click here to see the chart.
Click here to visit SenderScore.org (A Return Path Product)
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