PHP, PHPMailer and SMTP Server

Hi,to every body i'm buildding a little application, for now i'm working in my localhost. I need to send a mail and i need to use phpmailer, but.. when i send a mail using phpMailer it tooks a lot of time, i suppose it is because the bandwidth (128kbps and 3 PCs connected in the LAN). any way i need to solve it. thinking a few i have found the next posible solutions: *install a SMTP server in my machine, so , when the phpMailer sends a mail , there is no routers to jump , and no need to consume bandwith, the PHP application does keep freezed "waiting for...". *use multithreading in php , how? creating a thread to send the mail, and the application can show me the next screen while the sender thread is working, but as long as i readed , it does not exists. I have found a solution in Linux by using forke function, "damn" i'm working on Windows. Like all, i supose there is a way to make it works in Windows. *Ask to my php comunity , explain my problem, and my posible solutions, and receive a good feeback in order to know wichone is better solution, and listen if there is other solutions so i will appreciate the contributions, thanks to every body