E-mail Relay Restrictions

[suzie]

Dear Friends,
I have a website(NewsPaper), where there is an option to send an e-mail from php script using php mailer function through SMTP server ( exchange windows 2003).
but it seems that spammers are routing SPAM through the server.

I need to restrict the mail relay, in order to grant permissions for those who are sending mails through our site using our PHP Form only. what shall i put in the relay settings..??

How can i do that to deny spammers from passing spam through our server???

Thanks in advance...

[wjgilmore]

Hi Suzie,

Hmmm this is strange because Exchange Server 2003 is configured to by default restrict activity to authenticated users. Consider checking out the instructions provided here to make sure your server settings haven't been inadvertently changed:

http://technet.microsoft.com/en-us/library/aa996446(EXCHG.65).aspx

Hope this helps!
Jason

==
W. Jason Gilmore
http://www.easyphpwebsites.com/

[dagon]

it they actully relaying via smtp, or just using your form to send spam?

[suzie]

thank you for your replies,

Thank you wjgilmore,

Thank you dagon
but I think that they are relaying via SMTP...because in less than 1 min thousand of e-mails arrive o queue Folder, and in my form the PHP code validate all the input by the users...

but to be 100 % sure, How can I know if they are using my SMTp or through the PHP Form???