Hello, I have an accepted domain that I do not use any more, in fact the accepted domain became a company that we sold. I need to forward emails sent to the users belonging to that prior accepted domain (still set as Internal Relay Domain). Those users have got some smtp addresses linked with other accepted domains. When I send mail from my Exchange server I get 550 Relay not permitted error.. Should I change the accepted domain configuration from my Hubcas and set it as External Relay Domain? To cut long description short, Exchange users belonging to my organization (*@company.com) need to send email to the *@company2.com (those user has smtp address set as *@company.com with external email address to *@company2.com) Hope I am clear enough.. Thanks, Graig

If you need to automatically forward messages to the now-sold company this is essentially a shared smtp namespace, which is described here: http://technet.microsoft.com/en-us/library/bb676395.aspx However I would ask: why do you have to forward mail for them? If they take over the MX record, you can simply delete the accepted domain for them and mail will flow as it would to anyone else. Mike Crowley Check out My Blog!

Thanks Mike. In fact the user was also using smtp addresses with our current domain and if a user is trying to send email internaly or from outside, that prior user needs to receive it. But as far as I undertand what you comment, I could remove the accepted domain and create a forward to the user's email address, correct?

I see if there are some users that are still in company1 but used both addresses then yes created the shared smtp names space as an external relay, create the send connector, if the mx has been not been updated then you need to specify the smarthosts to their servers. However you need to start weening yourself of of the shared smtp namespace if you guys want to completely be independant at some point, if you just did the cutover you can give it some weeks until your users start sending email as the new primary SMTP domain, then in a few weeks you cut over your mx record to them. James Chong MCITP | EA | EMA; MCSE | M+, S+ Security+, Project+, ITIL msexchangetips.blogspot.com