As an administrator, receiving an email when a user registers to my blog is important. How do I enable this feature?
Check your mail address from your profile. If it is true;
Check your junk/spam folder. If there is nothing;
Check your mail() function on your server. Because if you are using shared hosting, it can be disabled.
If it's disable but you have personal server;
4.1. Turn it on in your php.ini
If it's disable and you have shared hosting;
4.2. Use STMP. If you don't know STMP; 5. Download 'WP-Mail-SMTP' plugin and configure it.