[Dovecot] Permission for /var/run/dovecot

[Dr. Ashok N. Ullal]

I have just installed my mail server on a Ubuntu Linux V.7.10 box with 
sendmail and dovecot imap from the Ubuntu packages. Each time the 
machines boots, I get the following messages:

Starting mail server:
dovecotWarning: Fixing permissions of /var/run/dovecot to be world readable
Warning: Corrected permissions for login directory /var/run/dovecot/login


After the boot the permissions visible are:
drwxr-xr-x root root 	/var/run/dovecot
drwxr-x--- root dovecot	/var/run/dovecot/login

What permissions do I need to set so that the warnings do not appear?