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Exchange 2007: Accept mail for unresolved recipients and forward to CatchAll-Mailbox

Posted on 2007-10-18
Medium Priority
Last Modified: 2009-02-04
I need Exchange 2007 to accept mail to unresolved recipients and send it to a dedicated internal mailbox.  I can find workarounds for this problem for earlier versions of Exchange, but not for 2007. Except a hint that this can be achieved by writing your own transport agent, but there is little info on how to do this (actually I did not have in mind to do this, but as a last line of resort...).

- In the target environment the exchange server is installed with all roles on the same server hardware.
-  I am aware of the (security related) side effects of accepting mail regardless of recipient existence, still it shall be done (during a migration period).
- We're migrating to Exchange, so my understanding of Exchange is not too deep (yet)...

Any help appreciated, thanks for listening !
Question by:sagy_ee
  • 2

Expert Comment

ID: 20107509
what do you mean by unresolved recipients?

Author Comment

ID: 20107567
I mean incoming mails which Exchange cannot assign to existing users.

Let's say our organization has two mail-enabled users "joe@company.com" and "bob@comany.com", and user "joe@company.com" has an additional mail alias "joe.smith@company.com" registered with exchange. Exchange will deliver mail exactly to these 3 addressees and reject mail to any other (unkown, unresolvable, unresolved...) recipients like "fred@company.com", by default it will send a rejection message to the sender if my understanding is correct.

I want Exchange to accept such mail, to not send back a rejection message and to deliver that mail to one dedicated internal mailbox, let's say to "unresolved@company.com". I call this mailbox the "CatchAll" mailbox.

Accepted Solution

sagy_ee earned 0 total points
ID: 20114513
I was able to solve this now: Wilbert de Graaf has compiled a perfect solution for this, and timely too:


I guess he is the one who deserves the points then... ;-)



Expert Comment

ID: 20156693
Closed, 500 points refunded.
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