Anybody here knows why I can't send mail to my Yahoo! account? I'm working on the registration script and tried to register a user with Yahoo! account; however, XAMPP says,
Warning: mail() [function.mail]: SMTP server response: 553 We do not relay non-local mail, sorry. in C:\xampp\htdocs\phplogin\register.php on line 60
Question: Why? and What should I do? Responses would be greatly appreciated; suggestions, too!