Chimera Computing Ltd


How to configure EFS and Microsoft Exchange Server to accept mail for the same domain


When you setup EFS, as well as Pop3 and Smtp details, you must also specify a domain name. This is so EFS knows what mail is destined for local users. The domain name you set MUST be an Internet registered domain name - the same domain name that someone external to your organisation would address a message to. In EFS, enter your primary domain under the 'Domains' tab. For more information, see the WHAT IS EFS and HOW DOES IT WORK?

When you setup Exchange 2000/2003 for the first time, it will create a recipient policy (essentially a rule that dictates the format users email addresses will be in) By default, it will configure the policy to use the same domain name as your Active Directory domain name. If you setup your Active Directory domain different to your registered Internet (email) domain (for example, 'mydomain.local' was your AD domain yet '' was your Internet domain), then you need to edit the default recipient policy in Exchange System Manager and tell it that you want all users mailboxes to utilise this address instead.

To do this, perform the following steps on your Exchange server:

1. Click Start, Programs, Microsoft Exchange, then click System Manager.

2. Expand the Recipients object, and then double-click Recipient Policies.

3. Right-click 'Default Policy' in the right pane, and then click Properties.
Note that the Filter rules entry defines a single entry of (mailnickname=*) and that in the Filter rules section, the Modify button and the Remove buttons are shaded. This behavior occurs because the default recipient policy must apply to all recipient objects (that is, all of those objects that have a mail nickname or alias).

4. Click the E-mail Addresses (Policy) tab. A list of generation rules for e-mail addresses is displayed. Rules exist for SMTP and X.400 addresses. You can edit these rules, but you cannot remove them. For example, if your organization decides to change its e-mail address from ".com" to "" click the SMTP rule, and then click Edit.

5. In the Address field, type the new SMTP address, and then click OK.

6. Click OK. You receive a message that states that you have changed e-mail addresses of SMTP type and you are prompted to update all corresponding e-mail addresses to match the new address format.

7. Either click Yes to update all existing addresses or click No if you do not want to change any existing objects. If you click No, the new SMTP address applies to all newly created recipients

For advanced configuration, see the following Microsoft article: KB319201


  • Ensure that the domain name in both EFS and Exchange are identical or delivery failures may occur

  • Ensure the 'postmaster' email address entered under the SMTP tab of EFS exists as an email address on an Exchange mailbox

  • An alternate (but not recommended) method to this is to use the VdA (virtual domain alias) feature under the SMTP section of EFS. This "aliases" your entire Internet domain to a local domain name. EFS simply replaces the Internet domain with the local domain prior to sending the message (it is recommended this is used as a last resort or for special configurations only)

  • (Chimera Computing Ltd)