Hmm. There must be some bug going on with the mail handling program. I don't really have full control over that, but I will try to check it out.
Have you checked your spam/bulk folders of your email programs? It could be your ISP's are filtering the notifications as spam. That is what happened a lot with the ForumUp forum notifications for many people. I do know that with the ForumUp forums (where our forum used to be hosted), some email providers have totally blocked notifications from ForumUp forums- not even putting them in a spam folder. Just never let them get delivered at all, with the customer not even knowing. Hotmail blocks a lot, and so does AOL. Verizon blocked emails from ForumUp, so I could never get notifications from our old forum on my email account with Verizon. I had to use Yahoo to get notifications. Those email providers consider many legitimate emails as spam when they come from a group such as a forum or newletter. So maybe something like that is happening for our new forum?
I do know that Yahoo works well and does not block anything- not even total real spam such as all those Viagra emails! But, Yahoo does put many things in one's spam/bulk folder.
I have been getting notifications, (on Yahoo) but since I have not been online for a while, I do not know if I got all of them. I don't go by them much anyway. Rather, I just come to the forum and then click on "Show unread posts since last visit" link at the top.
But, of course I would like the notifications to work well.
If people had been getting them, then not, then yes again, that would point to a glitch in this forum's emailer.