[pfx] Re: New to Postfix, Google problems

>On 07/08/2026 6:35 pm, Jaroslaw Rafa via Postfix-users wrote:
>>My table referenced in smtpd_client_restrictions contains
>>
>>bc.googleusercontent.com	REJECT

On 19.08.26 13:31, Linkcheck via Postfix-users wrote:
>  check_client_access pcre:/etc/postfix/client_checks.pcre


>and created the file client_checks.pcre with the content
>
>/Received:\sfrom\s.*bc\.googleusercontent\.com/	REJECT googleusercontent

check_client_access checks clients' IP address and hostname, not headers.

It can also check parent domain or subnet, but not when you use PCRE.
gernerally, only use PCRE when really neesed.


>At various times I have replaced \s with a space and removed the \ 
>from \. but nothing seems to work. A typical email header line for 
>googleusercontent is
>
>Received: from dreampairshoes.com 
>(219.172.193.35.bc.googleusercontent.com [35.193.172.219])
>	by mail.bristolweb.net (Postfix 3.7.11/8.13.0) with SMTP id unknown
>	Sun, 16 Aug 2026 20:04:03 +0100
>	(envelope-from <[email protected]>);
>
>I have been using postfix for several years and thought I'd mastered 
>this sort of thing but obviously not. :(

You can use hash (for now), cdb or lmdb database, see:
http://www.postfix.org/access.5.html

and e.g. put 

.bc.googleusercontent.com	REJECT googleusercontent

Note this doesn't apply when your parent_domain_matches_subdomains contains 
"smtpd_access_maps"
... but in such case it's better to remove smtpd_access_maps from 
parent_domain_matches_subdomains and use it as I described


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