i'm having trouble with the mail server included in apple os 10.1.5

we have not been using the service but now want to start, how do i
clear or recreate the mail message database (MacOSXMailDB)

Library/ApplemailServer/MacOSXMailDB

i have tried just running the command line repair tool, but this is
taking ages, it has been running flat out on the server for 30 minutes
now and shows no sign of finishing today.

we dont need to keep anything that is currently in it, so is there a
way to just quickly recreate this file?

thanks in advance for any help
jim