Recommended number of fds on a SJES5 install

Hello,
We're in the process of moving our smtp infrastructure on SJES5 on brand new T2000 (32 cores @ 1.2GHz with 16GB RAM, running SunOS 5.10).
Nowhere in the deployement guidelines or anywhere else I've seen a recommendation regarding ulimit -n and which value I could put there ?
I'm looking for someone who might have played around with some values and his/her experience with it.
Typically I'm trying to tune mail stores housing about 150,000 - 250,000 mailboxes for the back-end and smtps / mx seeing a message flux in the order of 10 millions+ messages a day.
This might be more a question for the OS forums than here (I don't dare cross-post), but it's here I might encounter admins experiencing about the same work load on his/her servers as I do.
Regards,
Jeff Gratton

To be able to use the Java ES Installer, the limit of filedescriptors should be at least 1024. if the value is smaller, you may experience some exceptions during the installation phase.
For specific values to tune Communication Suite products like Messaging Server, I suggest to ask the question at the dedicated forum :
http://forum.java.sun.com/forum.jspa?forumID=708 (for Messaging Server)
http://forum.java.sun.com/forum.jspa?forumID=737 (for Calendar Server)
http://forum.java.sun.com/forum.jspa?forumID=732 (for Instant Messaging)
Thanks

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