This is actually a problem that I'm having with my http://www.somewhereorbust.com site. People are subscribing, but the email from WordPress doesn't always arrive via email and when they go to re-subscribe, no new email is ever sent.
One person told me they were not receiving the email, even though they were re-subscribing weekly, but I found their confirmation email in their spam box.
How do you get WordPress to resend to people who have not yet confirmed their subscription and cannot find it in their spam box?
The blog I need help with is noahlederman.wordpress.com.