Subscription mails being send

Hi,

I have alot of people who have a subscription on my blog. Today I tested it and I do get correct confirmation when i subscribe. On the other hand, I just posted a blog my self and i do not get an update...

So I guess the mailing of new blogs on my site doesn't work for subscribers. How can I see and thest if this works or how can I fix this?

http://www.hrzone.nl