Email Notification Issues

[Doomed Hero]

A couple of players in my PbP game have noticed that the email notifications aren't consistent. I was curious if anyone else has noticed this problem, and if any of the Admins could shed some light on what might be going on.

[Nifelhein]

First time I hear about it, they always worked perfectly for me. The only situation I know might cause problems is if the person doesn't open all the pages in the thread, thus leaving some unread posts.

Other than that this is the first time I hear about it.