On 15.03.23 11:17, Gerd Hoerst via Postfix-users wrote:
in my /etc/postfix/main.cf

parent_domain_matches_subdomains = ..... . smtpd_access_maps
..
smtpd_sender_restrictions =  ......  check_sender_access 
hash:/etc/postfix/access

in my main.cfs

domain.com   DISCARD Spam rule domain block

but emails from  xxxx.yyyy.domain.com or xxxx.domain.com is still delivered.

were there any other rules? or subdomain listings in the /etc/postfix/access ?

blocking domain.com works


i also tried without smmtpd_access_maps under parent_domain_matches_subdomains 
and used .domain.com in /etc/postfix/access
but also not success

btw: postmap /etc/postfix/access and postfix reload was done.. postfix is v 
3.4.13 (Ubuntu 20.04)

Or you have another idea to block emails senderaddresses in a domain and its 
subdomains ?

I recommend not using parent_domain_matches_subdomains and using .example.com instead.

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