Hmm...Windows has suffered a catastrophic failure and will shut down -> my brain.

Please...somebody remind me how I would exim run as a group on the following...

/etc/shadow
/usr/lib/courier-imap/share/imapd.pem
/etc/pam.d/exim

I know it would be chgrp, but I can remember the correct syntax....or the next step...or step before that.