At 21:05 19/09/2006, you wrote: Thanks Drew Seems like MailScanner defaults to posix but for 8.12 it is flock we are running 8.12.13 will try both to see if I find the right one. Wayne >Locking. > >Check the lock type in MailScanner.conf is the same as the locking >method complied into Sendmail (posix for versions 8.13.x from memory). > >Drew > >--