Dear Exchange experts,
I am running exchange server 2k. Our server is getting spam emails and relaying through our server. I have following settings:
Access Tab - Relay section on SMTP server.
Select which computers may relay:
- only the list below
- Checkbox: Allow all computers which successfully authenticate: checked ON
Access Tab - Authentication section
All three checkbox checked ON (Anonymous access, Basic, Integrated windows)
(I followed: http://www.msexchange.org/tutorials/MF005.html
Please tell me... Is my server open relay????????????
If not, then why spammers connect to server?? they connect and denied but then it is eating up CPU..... Also I am running GIF MailEssentials and have all rules setup.. This one is also eating lot of memory...almost CPU maxed out (100%)...
My boss says, he wants that all spammers trying to relay their emails, should not even be allowed to connection to SMTP server.. How can I perform this???