Is there a way to tell if someone read the email I sent to them?

Go to mail, then check the sent underneath. It will tell ya

open mail
open sent mail
on right it says read and if it's ckd off it's been read

as Tami and Fran have said...if you go to your sent mail
http://mingle2.com/inbox/sent

there will be a check under the "READ?" column

Oh, duh. Thanks. Once again I was able to come up with such an obvious question!