How To Block an Entire TLD in Postfix
erics, Posted September 13th, 2016 at 2:14:33pm
Step 1. Execute the following two commands:
postconf -e smtpd_sender_restrictions=pcre:/etc/postfix/rejected_domains
postconf -e reject_unauth_destinations=pcre:/etc/postfix/rejected_domains
If that doesn’t work, you may hand-edit main.cf and add/edit these lines:
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smtpd_sender_restrictions=pcre:/etc/postfix/rejected_domains reject_unauth_destinations=pcre:/etc/postfix/rejected_domains |
Step 2. Create the regex filter file:
vim /etc/postfix/rejected_domains
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/\.top$/ REJECT No spam allowed from the .top TLD /\.stream$/ REJECT No spam allowed from the .stream TLD |
Step 3. Signal Postfix to reread the config:
postfix reload
NOTE: Do NOT use the postmap command for the rejected_domains file, postmap is only for hash or lmdb files.
Categories: How-To's, Technology Amazon Linux, AWS, Block, Filter, howto, Linux, PostFix, tips, TLD
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