Thanks for the response Mary,
In the user page of the server manager, the admin user currently has it's forwarding address set to the 'techs' group, which includes the local IT guys, and an email account that forwards to us.
The problem appears to be that a lot of system generated emails, get delivered to admin@domain.com, rather than admin@domain.local, and aside from smartd, there does not seem to be an easy way to change that email address. For example, for raid failures and rebuilds, it looks to be hardcoded in /sbin/e-smith/mdevent, and sends to admin_raidreport@domain.com, which we get, because it's not admin@domain.com.
I'm wondering what other system messages we're not seeing, becasue they go to admin@domain.com instead of admin@domain.local.
Thanks.
Paul.