"Notifly" e-mails not going out?

For some reason the e-mail addresses that are listed in the Settings > Discussion area under ‘Notify” have stopped receiving e-mails when there is a new post since last Wednesday, 6/13 – they did not receive an e-mail from a post made today at http://kokooncentral.com. I do not remember changing any settings. Thanks in advance for any advice!

http://wordpress.org/extend/plugins/notifly/