emails suddenly stopped being sent

I have used your plugin for well over a year and all of a sudden, after what I think was the latest upgrade, emails stopped going out to users. I haven’t changed any settings or upgraded any software on the server.

I am using the “for each post” method.

Also, you created this little mini plugin for me a long time ago; http://wordpress.org/support/topic/plugin-subscribe2-limit-to-plain-text-excerpt?replies=21

Do you think it is the cause of the bug? I’d be happy to make another donation if you could solve this problem for me 🙂

https://wordpress.org/plugins/subscribe2/