It seems to be working fine for me (will update this post in a few minutes when I check my account for new notifications but I got some earlier tonight).
If it is still happening -- any changes to your mail filters or something? (Could be getting filtered as spam if you have some how changed those settings -- one of several possibilities, just asking)
edit/Update: Yeah, as of right now, I am still getting update notifications. So either whatever you experienced has passed (you did post about 4 hours ago) or, if it is still happening then it's either a personal mail account setting or MX transfer between ENworld's IP and your ISP is being deferred for some (generally temporary) reason.