mail function error - win32

I try to send from my pc a mail with the function mail(), but if doesn't work, I have tried several time, but nothing, I don't know what could be, because the same script work well in a remote host. in my php.ini, I put: [mail function] ; For Win32 only. SMTP = mail.serbis.com I also put [mail function] ; For Win32 only. SMTP = mail.webdevfm.com I also put (the local mail server that I have): [mail function] ; For Win32 only. SMTP = ojpp.myftp.org -------------------------------- the errors are the follow: ** First error - When the mailserver (ojpp.myftp.org - localhost) is deactivated Warning: mail(): Failed to connect to mailserver at "ojpp.myftp.org" port 25, verify your "SMTP" and "smtp_port" setting in php.ini or use ini_set() in d:\htdocs\ojpp\ojppresume\contact.php on line 118 Warning: mail(): Failed to connect to mailserver at "ojpp.myftp.org" port 25, verify your "SMTP" and "smtp_port" setting in php.ini or use ini_set() in d:\htdocs\ojpp\ojppresume\contact.php on line 138 ** Code in line 118 $validar = mail('', $materia, $cuerpo, "To: $para\n" . "From: test <$email>\n" . "MIME-Version: 1.0\n" . "Content-type: text/html; charset=iso-8859-1"); ** Code in line 138 $validar = mail('', $materia, $cuerpo, "To: $para\n" . "From: Webdevfm <$email>\n" . "MIME-Version: 1.0\n" . "Content-type: text/html; charset=iso-8859-1"); ** Second error - When the mailserver (mail.webdevfm.com) is actived Warning: mail(): SMTP server response: 503 valid RCPT command must precede DATA in d:\htdocs\ojpp\ojppresume\contact.php on line 118 ** Third error - When the mailserver (mail.serbis.com) is actived Warning: mail(): SMTP server response: 503 must have sender and recipient first in d:\htdocs\ojpp\ojppresume\contact.php on line 118 Error enviando correo electrónico a ojpp@ojpp.myftp.org ** fourth error - When the mailserver (ojpp.myftp.org - localhost) is actived Warning: mail(): SMTP server response: 503 Bad sequence of commands in d:\htdocs\ojpp\ojppresume\contact.php on line 118 --- thanks, for the help.