[Exim] need urgent help with exim 4 and RBL ?

hi,

i need help with useing RBLs and exim 4, i want to stop relaying .....
i put

hostlist relay_from_hosts = ! ${lookup pgsql{SELECT host FROM
host_blacklist where aktiv=1 group by host}{$value}fail}
acl_smtp_rcpt = acl_check_rcpt

in the mainsection
and

acl_check_rcpt:

#  accept  hosts = :
  deny    local_parts   = ^.*[@%!/|]
  message = invalid characters in local part

  accept  local_parts   = postmaster
          domains       = +local_domains
  require verify        = sender

  accept  domains       = +local_domains
          endpass
          message       = unknown user
          verify        = recipient

  accept domains        = +relay_to_domains
        endpass
        message         = unrouteable adress
        verify          = recipient

    deny senders =  :
    deny dnslists = blackholes.mail-abuse.org
            message = rbltest

  accept  hosts         = +relay_from_hosts

    #senders            ="${lookup pgsql{select adr from account where
adr is not null}}"
    verify              = sender

  accept authenticated  = *
  deny    message       = relay not permitted

in the acl-section of exim, but i dont know if it works.... spammers
still relaying, my server is also listed now :(( how can i stop
spamming? i thought acl and rbl was the right way, but it doesnt work
for me....please please please help!

...and senders with an empty from-field <> are also relayed :(( how can
i stop this?

i read so many howtos, docs and manpages, but im very confused now,
.....

volker