[TYPO3] contact form error / cannot delievery ?

[Gayus Wiratama]

Dear Guru in Typo3,


Please help me out, i cannot send test from contact form, result below .....
im trying to search and fix then i give up. i didnt make modification from
that script before.
Thx.



*Warning*: mail()
[function.mail<http://127.0.0.1/cms/typo3/install/function.mail>]:
SMTP server response: 550 5.7.1 Unable to relay for www.gayus.biz at gmail.comin
*C:\Program Files\xampp\htdocs\cms\t3lib\class.t3lib_htmlmail.php* on line *
711*
0MAIL WAS SENT TO: www.gayus.biz at gmail.com

*Functions disabled: none* *Sendmail path not defined!* *sendmail_path=*
This may be critical to TYPO3's use of the mail() function. Please be sure
that the mail() function in your php-installation works!

You can check the mail() function by entering your email address here and
press the button. You should then receive a testmail from test at test.test.
Since almost all mails in TYPO3 are sent using the t3lib_htmlmail class,
sending with this class can be tested by checking the box *Test
t3lib_htmlmail* below. The return-path of the mail is set to null at 127.0.0.1.
Some mail servers won't send the mail if the host of the return-path is not
resolved correctly.

-- 
regards,

Gayus Wiratama
-------------------------