I have installed a Windows 2000 server with IIS and an SMTP server to
relay incoming email to our main email server. Since it's installation
I recieve non-delivery messages from the Postmaster indicating a
message failed to be delivered. The Sender also gets a non-delivery
notification.
There are 2 variations.
One appears to legitimate bulk email (non-spam) to hundreds of
recipients. The other is remote users with our domain name as their
email address but their own ISP's SMTP server.
I have ben thru all the settings and can't figure it out.
Any ideas ?
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