how I do make two mail domain on one mail box?

[alexus]

I have two domain:
"ext.ru" in the internet and windows domain "ext.local" in local net.
I have mail server Release 5.0.16_GA_2921.SuSEES10_20090429054456 SuSEES10 FOSS.
Mails server has two Ethernet link: in local net and to internet.
how I do make two mail domain on one mail box?
for instance, alex@ext.local and alex@ext.ru is a one mail box.
Thanks

[phoenix]

Just go to the Admin UI and create your second domain then point any relevant DNS records at the server.