I am seeing errors in our log as follows
Nov 07 14:20:06 POP3(user937):Error: Mailbox INBOX:
file_dotlock_create(/var/mail/user937) failed: Permission denied
(euid=937(user937) egid=100(user) missing +w perm: /var/mail, we're not in
group 6(mail), dir owned by 0:6 mode=0775) (set mail_privilege
Different opinion, we successfully use NFS in most of our large scale
deployments of MagicMail, with little or no issues, but you do have to
have a proper NFS server. You can never go wrong with NetApp, and they
aren't that expensive any more.. have deployments working like that for
almost 20