I successfully used Email Users yesterday to notify users of a blog post. I have not made any changes to my wordpress site or to the plugin, yet today, emails are not sending. I've tried sending from a blog post, from a page, and just sending an email to selected individuals. I've tried sending a couple of test messages - not going through.
I did clear my browser history, logged off my wordpress site, logged back on, deactivated then reactivated the plugin, but nothing seems to help. Any ideas?