Restrict clients to those with valid DNS and HELO

2022-09-15 21:08:08 -05:00
parent a75d3705a0
commit 9f2438be2a
2 changed files with 4 additions and 0 deletions
--- a/templates/Fedora/36/etc/postfix/main.cf
+++ b/templates/Fedora/36/etc/postfix/main.cf
@@ -760,4 +760,6 @@ error_notice_recipient = {{ postmaster_email }}
 smtpd_helo_required = yes
 disable_vrfy_command = yes
 message_size_limit = {{ postfix_message_size_limit }}
+smtpd_helo_restrictions = reject_unknown_helo_hostname
+smtpd_client_restrictions = reject_unknown_reverse_client_hostname reject_unauth_pipelining