IIS 5 & IIS 6
restrict smtp Relay
Last post Sep 30, 2009 07:54 AM by Paul Lynch
Sep 29, 2009 05:17 PM|robert03|LINK
I have an IIS server using smtp and a few domains on this server. currently code is using localhost to send mail then this is forwarded to my actual mail server.
Is there a way to check the senders email field to make sure its part of a domain on the server?
i guess currently its open relay. users can use any from address. the server doesn't check it and forwards the email to the mail server.
Sep 30, 2009 07:54 AM|Paul Lynch|LINK
Refer to this KB article :
How To Prevent Mail Relay in the IIS SMTP Virtual Server in Windows Server 2003