Hello Ansgar, > smtpd_recipient_restrictions = > ... > check_client_access pcre:/etc/postfix/client_access.pcre
> /\.artegic\.net$/ REJECT Not accepting mail from your domain. thank you. I put that in my configuration. I already had check_client_access under smtpd_client_restrictions but as hash. Thank you for helping me block these spammers. Cheers, Thomas