I have added a domain on the exchange server and I get " 550 5.7.1 domain invalid "when trying to send an email to a user with an email address on the domain. I added the domain under the default recipient policy on the exchange 2000 server. I have other email domains defined that work on this same exchange server. I haven't added a domain for quite a few years, so maybe I am forgetting a step. I did restart the server as well. Any help would be appreciated.