Error Failed to connect to mailserver at localhost port 25 verify your SMTP and smtp port setting in php ini or use ini set in C wamp www niroj register php on line 50

Question

I keep getting this error when I try to send an e-mail in PHP:

Warning: mail() [function.mail]: Failed to connect to mailserver at "localhost" port 25, verify your "SMTP" and "smtp_port" setting in php.ini or use ini_set() in C:\wamp\www\niroj\register.php on line 50

my php.ini looks like this:

[mail function]
; For Win32 only.
; http://php.net/smtp
SMTP = localhost
; http://php.net/smtp-port
smtp_port = 25

; For Win32 only.
; http://php.net/sendmail-from
sendmail_from = deyneeraj@gmail.com

I'm using my laptop as a server.. What am I doing wrong?

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