Send Email from Subscribe by Email After publish

Hello--
I have the need to send something out to our ~800 people that follow us through the Subscribe by Email plugin from you all. I did not have the right category selected on a post when I published it, therefore it did not go out to the masses through our email chain.

Is there a way to override this or perhaps another plugin available that I can send this information out?

Secondly, what is recommended for automatically posting to Facebook/Twitter, etc?

THanks,
David