You can configure James to accept email for more than one domain by adding the additional domains to the <servernames> section in the config.xml file.
Add the domains to the <servernames> section of this file: /usr/local/sourceforge/james/james-2.2.0/apps/james/SAR-INF/config.xml.
<servernames autodetect=""true"" autodetectIP=""true""> <servername>localhost</servername> </servernames>
You can add other host names for James to accept mail for by adding more <servername> blocks. The comments in the config.xml file explain this further. Please keep in mind that these changes may be overwritten by future SFEE upgrades.