I guess this is a PHP problem, but I am not really sure so I am posting it here. A week ago my Wordpress blog was working fine, sending me emails when new comments came in, new users joined, etc. But now the script that sends the email is all of a sudden not working. I have checked and the email address for the admin user is correct (my email address). Anyone have any suggestions? Thanks a lot.
Your web host might have disabled the php mail function on the server. So, consult your host. If the mail function is disabled, you need to use wordpress smtp plug-in.