In need of an SMTP server program...

I have tried free smtp server, but when I try to run it, all that comes up ir an error saying that the DNS or internet is not accessable. I have also tried QK smtp server, but it doesn't want to work with what I need it for, to email the emails that are generated from my message board that I am hosting on that computer.

Can anyone steer me in the right direction here?

windows or linux?

Windows XP Pro with SP1a.

here's a few that google turned up

http://www.thebestfree.net/free/freesmtp.htm

http://www.softstack.com/advsmtp.html

http://www.sharewareriver.com/product.php?id=7101

Ok guys, I got it up and working on Advanced SMTP. Thanks.