Email Configuration Diagnostic

Operating System: Linux
SMTP Setting (php.ini): localhost
SMTP Port (php.ini): 25
Sendmail Path (php.ini): /usr/sbin/sendmail -t -i

WARNING: Invalid email parameter, using default

Attempting to send to: teokahseong@gmail.com

RESULT: TRUE

PHP accepted the email to teokahseong@gmail.com.
If you don't receive it, your ISP or local network is likely blocking unauthenticated SMTP traffic (common on localhost).