SMTP Addressing Format Not Supported

[This topic is intended to address a specific issue called out by the Exchange Server Analyzer Tool. You should apply it only to systems that have had the Exchange Server Analyzer Tool run against them and are experiencing that specific issue. The Exchange Server Analyzer Tool, available as a free download, remotely collects configuration data from each server in the topology and automatically analyzes the data. The resulting report details important configuration issues, potential problems, and nondefault product settings. By following these recommendations, you can achieve better performance, scalability, reliability, and uptime. For more information about the tool or to download the latest versions, see "Microsoft Exchange Analyzers" at]  

Topic Last Modified: 2009-12-16

Microsoft Exchange Server 2007 and Exchange Server 2010 setup cannot continue because the specified recipient policy uses an unsupported Simple Mail Transfer Protocol (SMTP) address format.

Exchange 2007 and Exchange 2010 setup requires that all SMTP addresses used for e-mail address policies not contain IP address literals, for example: user@[].

To resolve this issue, change the value of the SMTP address in the recipient policy so that it does not contain an IP address literal. Replace brackets ([]) and numbers ( of the IP address literal with the Domain Name System (DNS) naming format, for example:, and then rerun Exchange setup.

For more information about managing recipient policies in Exchange Server 2007, see "Managing E-Mail Address Policies" (

For more information about managing recipient policies in Exchange Server 2010, see "Managing E-Mail Address Policies" (