I thought the usual ways of doing this were to either use a high-performance NFS server (netapp filer...) and maildir format so you can run imap from any client facing server, or to keep the delivery host information in an LDAP attribute that you find when validating the address.
This is the 'I have the money' way of doing this ;-) _______________________________________________ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos