thezookeeper
Joined: 28 Feb 2006
Posts: 1
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 Posted:
Tue Feb 28, 2006 11:36 am Post subject:
Shared SMTP Namespace causing loops |
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As an MCSE (2003) and MCSA:Messaging, I like to think I know all I should about Exchange, but this time I need to scream for help!!
I'm a network admin for part of a larger group of companies.
We accept mail for the group smtp namespace (let's call it @ourgroup.com) to our Exchange 2003 Organisation, then forward to the individual companies within the groups, who all have their own unfederated AD Forests/Exchange Organisations. This is done using either DNS SMTP connectors, or direct SMTP connectors.
The receiving servers send as "@ourgroup.com", but receive using their old company namespace.
The issue we are suffering is that when an e-mail is sent to a list of people "@ourgroup.com", and those people work for different companies within the group, the following process takes place :
1. We accept the mail
2. We forward the mail to each server containing recipients
3. The receiving servers place the mail in the mailbox of the recipient, then forward to the rest of the recipients
4. These mails come to us for distribution
5. etc until the loop times out and NDRs are issued...
Although the message has been received by the individual recipients, the sender still receives the NDR and bleats!
Is there any way we can expand the recipient list using Exchange, and only forward one copy of each mail to each recipient, so that the receiving server simply places the mail in the recipients mailbox and doesn't try forwarding on?
These mail servers cannot be set as responsible for the namespace or they wouldn't be able to send mail to other users in the group.
Many thanks in advance!!
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