postfix: chain override issues

[Peter]

Hi guys,

I am having the following helo chain that stops a lot of SPAM emails:

smtpd_helo_restrictions =
  permit_mynetworks,
  check_client_access hash:/etc/postfix/helo_override,
  check_helo_access hash:/etc/postfix/helo_access,
  reject_unauth_pipelining,
  reject_invalid_helo_hostname,
  reject_non_fqdn_hostname,
  reject_invalid_hostname,
  permit

My helo_override consist of IPs that have silly "helo" or also because
of many other reasons. Nevertheless, the syntax goes the following way:

1.2.3.4 OK
2.3.4.5 OK
3.3.5.6 OK

Now, when I postmap the helo_override and execute the following command
to test I am getting expected values:

postmap -fq "1.2.3.4" /etc/postfix/helo_override
OK

However, that does not end the chain. I would like to understand why,
alternatively could you please explain what is beyond my comprehension
then?

Thanks,
P.