Lion Server: postfix warnings

This is on a clean, default Lion Server install: # postfix check postfix/postfix-script: warning: not owned by _postfix: /Library/Server/Mail/Data/mta/./greylist.db postfix/postfix-script: warning: not owned by _postfix: /Library/Server/Mail/Data/mta/./whitelist.db postfix/postfix-script: warning: group or other writable: /Library/Server/Mail/Data/mta Are these warnings of concern, and if not, is there a good way to suppress them? Rusty