From: Brian Evans - Postfix List (grknightscent-team.com)
Date: Mon Nov 09 2009 - 08:49:16 CST

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frantisek holop wrote:
> main.cf:
>
>
> smtpd_helo_restrictions =
> permit_mynetworks
> check_helo_access hash:/etc/postfix/client_checks
> reject_unlisted_recipient
> reject_invalid_helo_hostname
> reject_non_fqdn_helo_hostname
> reject_unknown_helo_hostname
>
> client_checks:
>
> # mailserver-with-invalid-helo.com
> aaa.bbb.ccc.ddd OK
>
>
Change check_helo_access to check_client_access.
helo access verifies what is passed with the HELO command (e.g. HELO
myserver)
client access verifies the IP of the connecting server

You can include client checks in helo_restrictions per
http://www.postfix.org/postconf.5.html#smtpd_helo_restrictions

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