I am having problems receiving comment notification emails. I also have a mail form that works so i know the path for sendmail on the server is correct as both files are in the same directory..
any ideas as to whats wrong? thank you much.

I had the same problem. Turned out my webhost was on some RBL (Blacklist) which made my ISP dump all email coming from my host. Might be an idea to check with your ISP.