Hi, You have to set it in the php.ini. Edit it (c:\wamp\php\php.ini) and set the desired values in the next fields: [mail function] SMTP = smtp.isp.net sendmail_from = Hope it helps smtp.isp.net it's your internet provider smtp server (mail sender). Anyway, you can override that in your scripts when you're using php mail function. I'm regularly using a html_mime_mail class, that deals with the mail sending.