diff --git a/root/etc/e-smith/events/actions/dovecot-acl b/root/etc/e-smith/events/actions/dovecot-acl
index 3ff142f..fea20ca 100644
--- a/root/etc/e-smith/events/actions/dovecot-acl
+++ b/root/etc/e-smith/events/actions/dovecot-acl
@@ -64,7 +64,7 @@ sub set_acl {
         system('/usr/bin/setfacl',
                '-R',
                '-m',
-               'u::rwX,g::rwX,g:sharedmailbox:rwX,d:u::rwX,d:g::rwX,d:g:sharedmailbox:rwX',
+               'u::rwX,g::rwX,o::rX,g:sharedmailbox:rwX,d:u::rwX,d:g::rwX,d:g:sharedmailbox:rwX,d:o::rX',
                "/home/e-smith/files/users/$user/Maildir") == 0 &&
         # Grant sharedmailbox group permission to go through
         # the home dir so it can access the Maildir, but don't let it read