milter-greylist permissions and owner

[Gary Aitken]

running 11.3 RELEASE-p6 with milter-greylist installed from packages.
I just noticed this message in my maillog:

milter-greylist: cannot open ">>/var/milter-greylist/greylist.log" at line 15: Permission denied

permissions:

/var/milter-greylist # ls -dl . *
drwxr-xr-x  2 mailnull  mailnull  512 Dec  1 21:42 .
-rw-------  1 mailnull  mailnull     1211 Dec  1 21:42 greylist.db
-rw-r--r--  1 root      mailnull  3724510 Mar 28  2020 greylist.log
srwxr-xr-x  1 mailnull  mailnull        0 Mar 12  2020 milter-greylist.sock

Since this was set up back a ways as a result of it first running or an
initial install, I haven't any idea what the ownership and permissions
should be.

hints?

If they are by chance correct, clues on what else is going on?


Thanks,

Gary