PHP的mail配置
Windows ONLY:

php.ini

[mail function]; For Win32 only.; http://php.net/smtpSMTP = 123.321.132.213; http://php.net/smtp-portsmtp_port = 25; For Win32 only.; http://php.net/sendmail-fromsendmail_from = Daemon@SYS; For Unix only.  You may supply arguments as well (default: "sendmail -t -i").; http://php.net/sendmail-path;sendmail_path = "\"\xampp\sendmail\sendmail.exe\" -t"; Force the addition of the specified parameters to be passed as extra parameters; to the sendmail binary. These parameters will always replace the value of; the 5th parameter to mail(), even in safe mode.;mail.force_extra_parameters =; Add X-PHP-Originating-Script: that will include uid of the script followed by the filenamemail.add_x_header = Off; Log all mail() calls including the full path of the script, line #, to address and headers;mail.log = "\xampp\apache\logs\php_mail.log"

<?php$ret = mail("xxx@xxx.com", "Test mail function.", "Hey,can u receive it?");echo $ret;?>