Hi Experts, I'm not involved in configuring (or anything else) Microsoft Exchange, but I have a project where we use Outlook Calendar integration. Basically, appointments are created with Contacts that have a non-existing email address (there is no way around this setup sincetheemail addressis key to determine the contact in the other application). When an appoinment is created, an invitation (meeting request) is sent out to the Contact. Since this is a non-existing email address, I'd like to avoid getting mails back stating that the Contact's email address does not exist. Can we get rid of these messages in an Exchange 2003/2007 setup? Alternatively, can we avoid sending out these meeting requests? There is one common format in the email address, all Contacts share the same domain (e.g. @fakedomain.com). Thank you, Sebastiaan.

Sebastiaan, Reading through your post I'd say you are in a little bit a tough spot on this one. I'd ask are the recipient e-mail addresses that are fake in a domain that the Exchange server is considered authorative for? If not I'd say make certain you send to a DNS domain that you have control of that way you can control how the mail system responds to the NDR. You could have it send via SMTP to another server that simply accepts the message and then just drops it. I don't know what it would do for the calendar request but it might be a clugy way to solve your problem. Sean

Hi Sean, Thanks for your reply. We found a way to filter this by means of the option "Silently drop the message" in Exchange 2007 (unfortunately I can not give you more details as it was not me that had set this one up). Now, I need to find something similar with a previous version of Exchange. I'll forward your comments to our Exchange admin to take into consideration. Many thanks, Sebastiaan.