A new SBS 2003 R2 (Exchange 2003 SP1) installation. The ISP routes mails directly to the server
I have several thousands of MAILS IN QUEYE and the tests says that the server is Open Relay. Currently I'm freezing the mails in ESM and planning to delete them. The process seems to take awhile (30 mins so far) and I would love to finish it (or is there any quicker way to get rid of those spams?).
I have few end users on the Site using Outlook 2000 - 2007 and couple RPC over HTTPS Outlook users Off Site. I have read "SMTP server failed open relay test"
Following above instructions I have done this:
In SMTP Virtual Server / Properties / Access / Relay Restrictions:
clear the Allow all computers which successfully authenticate to relay, regardless of the list below check box, and then click Users to specify a subset of users that you want to grant relay permissions on this SMTP virtual server.
I have granted Submit permissions for AUtenticated Users
I have granted Submit and Relay permissions for selected users (to those who use Outlook)
The Tarpit time is 5 seconds
What can I do? I'm affraid that the ISP will block port 25 pretty soon. I have noticed that there were delays when sending or receiving mails apparently the server were busy processing spam.