/usr/bin/saslauthd: invalid option -- '-'
usage: saslauthd [options]

option information:
  -a <authmech>  Selects the authentication mechanism to use.
  -c             Enable credential caching.
  -d             Debugging (don't detach from tty, implies -V)
  -r             Combine the realm with the login before passing to authentication mechanism
                 Ex. login: "foo" realm: "bar" will get passed as login: "foo@bar"
                 The realm name is passed untouched.
  -O <option>    Optional argument to pass to the authentication
                 mechanism.
  -l             Disable accept() locking. Increases performance, but
                 may not be compatible with some operating systems.
  -m <path>      Alternate path for the saslauthd working directory,
                 must be absolute.
  -n <procs>     Number of worker processes to create.
  -s <kilobytes> Size of the credential cache (in kilobytes)
  -t <seconds>   Timeout for items in the credential cache (in seconds)
  -v             Display version information and available mechs
  -V             Enable verbose logging
  -h             Display this message.

saslauthd 2.1.28
authentication mechanisms: sasldb getpwent kerberos5 rimap shadow httpform