We will be adding a new domain email address to our mailboxes in our org and although we will keep the old email addresses, I would like to let users outside the org know that although their email was delivered, please contact this person with the @newdomain.com. Is this possible? If so, could you please describe the technology and steps involved. Thank you.

The version of Exchange would have been nice. 2003: http://www.computerperformance.co.uk/exchange2003/exchange2003_recipient_policy.htm do that and add the new one then click to make it primary. Leave the old one there and mail will be delivered to both domains for as long as you have the older one registered. Dont do that auto-reply thing, its a bad, bad idea. Just have all new mail go out with the new address and have them modify their Outlook signatures with a line to draw attention to the new domain. For 2007 and 2010: http://www.msexchange.org/articles_tutorials/exchange-server-2007/management-administration/managing-email-address-policies.html follow that. Then, rather than the Outlook signature you can add a line to your Hub Transport disclaimer rule to draw the attention to the new domain name. "rmr1r" wrote in message news:79114660-18cf-4384-9d62-aeaf49d2ccca... We will be adding a new domain email address to our mailboxes in our org and although we will keep the old email addresses, I would like to let users outside the org know that although their email was delivered, please contact this person with the @newdomain.com. Is this possible? If so, could you please describe the technology and steps involved. Thank you. Mark Arnold, Exchange MVP.

2007 SP3 w/RU1 The Hub Transport disclaimer will work for outgoing messages only correct? What about an auto-reply to incoming messages saying your message was deliverd but please use the new domain when sending messages?

Mark's answer is spot on. You don't want to respond to new emails saying the address has changed, because if you start that now, when are you going to shut this off? Let the user's sig block in Ex2k3 and a central sig block in Ex2k7 and Ex2010 alert the recipients that the email address has changed, and leave the old address. This has worked for every one of my customers over the past 15 years, and is working for my new company when they acquire other companies.

Mark and Willard, thanks for the advice. I'll go with it. Good job!