I am running Exchange 2000 with sp3 and yesterday I could no longer send to anyone at cisco.com. The error message is:
You do not have permission to send to this recipient. For assistance, contact your system administrator.
<exchange.ads.domain.com #5.7.1 smtp;550 5.7.1 <email@example.com>... Relaying denied>
This has worked in the past as we have several cisco products and talk continually. My SMTP relay properties allows my internal address and also allow authenticated users to send email.
I have also checked against SPAM lists and have not found my address anywhere. I have also checked reverse DNS to ensure I have a record there.
I am able to send to many other domains and cisco.com is the only domain that I know of that I cannot send to.
Any help is appreciated as I need to be able to send to them.