In answering a question posed on July 20, 2005, David Sengupta suggested the following when asked about a user receving the error message "You do not have permission to send to this recipient."
"The most common scenario in which I've seen this particular error is when companies are using a Cisco PIX firewall with xxxx configured. If you have a PIX, you'll want to ensure that the Mailguard feature is set according to the following Microsoft Knowledge Base article 320027."
My question is this--what if you're getting this error message and there is no Cisco PIX firewall between the sending and receiving servers? I'm trying to migrate to Ex2K3, and I'm getting this error message when I try send email to a mailbox on Ex2K3 from SendMail. The messages sit in the queue on the Ex2K3 mailbox server with these errors logged. Is there an IIS or DNS setting on the mailbox server that should be checked?
Our current messaging platform is Exchange 5.5 (I know, I know) and we're migrating to a brand new org in Ex2K3. I can send messages from Ex2K3 to 5.5, but I get the error mentioned above when trying to send from 5.5 to Ex2K3.
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