I'am using SMTP virtual server to send e-mail from a website done in PHP. when Users visit our site they have the option to send e-mail from our PHP Form through IIS (SMTP virtual server) - Microsoft Windows Server 2003. But it seems that spammers are passing spam through our server, they are using our SMTP to send Spam..and thousands of e-mails will sit in our Queue Folder. What are the SMTP settings to prevent Spammers??? where I have to give Authentication( where to put the username and password)to let only authenticated people to relay e-mail through SMTP ???Thanks in Advance, Regards, suzi

Hi, You may refer to the following article to secure your SMTP virtual server. How to help secure SMTP client message delivery in Exchange 2003 http://support.microsoft.com/kb/823019 If you have more questions, it is recommended that you may initial a new thread in the Exchange forum. The engineers and community members there have more experience with Exchange and SMTP virtual server and can help you in a more efficient way. Exchange Forum http://social.technet.microsoft.com/Forums/en-US/category/exchangeserver/ Thanks. This posting is provided "AS IS" with no warranties, and confers no rights.

Hello My organization has a 30 PC with Outlook Client, one in PC send lot of spam, I need a find this PC, We use server2003 domain and ISA Server2004, without Exchange. Please help me how I can find this PC, thanks

Hello My organization has a 30 PC with Outlook Client, one in PC send lot of spam, I need a find this PC, We use server2003 domain and ISA Server2004, without Exchange. Please help me how I can find this PC, thanks Please make a new thread.Creativity cannot be taught, but it can be learned.