为什么下列代码无法实现发送邮件?

[sangdy]

<?
mail("[e-mail]","hello","welcome");
?>
*******************
[mail function]
; For Win32 only.
SMTP = SMTP.CITIZ.NET

; For Win32 only.
sendmail_from = FROM:[e-mail]

[多菜鸟]

mail函数在linux下使用的，不能在win下使用。

[xuzuning]

sendmail_from = [e-mail]

[sangdy]

<?
mail([e-mail],"hello","welcome");
?>
**********
运行上述代码,出现下列错误提示:
Parse error: parse error, unexpected '@' in C:\httpd\mail.php on line 2