/var/qmail

# This is the sqmail home directory. It must be a local directory, not
# shared among machines. This is where qmail queues all mail messages. 

/usr/local/qmail

# This is the alternative of OS with don't allow suid on /var (OpenBSD).

# The queue (except for bounce message contents) is crashproof, if the
# filesystem guarantees that single-byte writes are atomic and that
# directory operations are synchronous. These guarantees are provided by
# fixed-block filesystems such as UFS and by journaling filesystems. Under
# Linux, make sure that all mail-handling filesystems are mounted with
# synchronous metadata.

# Note: The sqmail binaries do not need to share the same mount point.