Microsoft KB Archive/262116

= XCON: How Exchange Server 5.5 Routes Custom Recipient Messages Internally =

Article ID: 262116

Article Last Modified on 10/28/2006

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APPLIES TO


 * Microsoft Exchange Server 5.5 Standard Edition

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This article was previously published under Q262116



SUMMARY
This article describes how Exchange Server 5.5 routes custom recipient messages internally.



MORE INFORMATION
When you send an e-mail message to a custom recipient address, the directory places the default address in the custom recipient address X.400 proxy address as a domain-defined attribute (DDA).

For example, if a custom recipient that has a default Simple Mail Transfer Protocol (SMTP) address of &quot;someone@microsoft.com&quot; has the following X.400 proxy address

C=us;a= ;p=Org;o=Site;s=Someone;g=MsGuy

when you send an e-mail message to that custom recipient that has a default SMTP address of someone@microsoft.com, the message is routed as follows, and is routed by DDA first:

C=us;a= ;p=Org;o=Site;s=Someone;g=MsGuy;dda=SMTP:someone@microsoft.com

If the message transfer agent (MTA) cannot find a route, the MTA routes on the X.400 address. In some cases the custom recipient address is routed to an X.400 connector with a &quot;C=*&quot; address space.

Typically, the message loops when the message is rerouted back to the originating site.

Keywords: kbinfo KB262116

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