Hi! I need to do some locks per domain. I'm getting a lot of spam with final domain .my .ltda .fun .fr .tk .cafe .ga .gl .gq ..etc ... I would like some tips as I have the following settings today. smtpd_sender_restrictions = check_sender_access hash:/etc/postfix/sender_block check_sender_ns_access hash:/etc/postfix/sender_block, check_sender_mx_access hash:/etc/postfix/sender_block, and file /etc/postfix/sender_block: anaronoz.ml REJECT adestlea.ml REJECT aquron.cf REJECT abaush.ml REJECT utonkish.tk REJECT envqaz.tk REJECT usoedc.tk REJECT /\.pro$/ REJECT We reject all .pro domains /\.date$/ REJECT We reject all .date domains /\.science$/ REJECT We reject all .science domains /\.top$/ REJECT We reject all .top domains /\.download$/ REJECT We reject all .download domains /\.work$/ REJECT We reject all .work domains /\.click$/ REJECT We reject all .click domains /\.link$/ REJECT We reject all .link domains /\.diet$/ REJECT We reject all .diet domains /\.review$/ REJECT We reject all .review domains /\.party$/ REJECT We reject all .party domains /\.zip$/ REJECT We reject all .zip domains /\.xyz$/ REJECT We reject all .xyz domains /\.stream$/ REJECT We reject all .stream domains /\.bid$/ REJECT We reject all .bid domains *.ml REJECT *.cf REJECT *.tk REJECT *.ltda REJECT *.fun REJECT *.my REJECT *.fr REJECT *.cafe REJECT *.ga REJECT *.gl REJECT *.gq REJECT *.gp REJECT *.ec REJECT *.lt REJECT *.fyi REJECT *.fi REJECT *.pro REJECT etc... however many emails that are listed within the sender_block file end up coming and going in the user's inbox. I tried to block the start of the domain, .my .ltda .fun .fr .tk .cafe .ga, as follows: header_checks = regexp:/etc/postfix/header_checks file /etc/postfix/header_checks /^Received: .*\.im .*$/ REJECT STOP SPAM 1 /^From: .*\.im .*$/ REJECT STOP SPAM 2 /^Received: .*\.ltda .*$/ REJECT STOP SPAM 3 /^From: .*\.ltda .*$/ REJECT STOP SPAM 4 /^Received: .*\.fyi .*$/ REJECT STOP SPAM 5 /^From: .*\.fyi .*$/ REJECT STOP SPAM 6 The result is not being positive because of these domains are passing. Any tip?