cpanel creating inbox with wrong chmod 644

I am getting mail errors that say that the mailbox in the wrong chmod 644,
What i did is that I just chmoded it to 660 or run /scripts/mailperm and this will fix it.

But this hapends with every account i create with cpanel, is there a way to tweak settings in a diffrent way in order to automaticaly cpanel give the right permissions?

Or is there a file in cpanel installation directory that i need to look into to see if settings are not right?

I will apreciate any advice, since i dont want to get stuck to do this modification manually every time a new account its been created.


Thanks in advance
L.T.