spam: Enable DKIM processing

[sysconfig/postfix.git] / main.cf

diff --git a/main.cf b/main.cf
index c068fdccd36b6710bd09ab4e65a111d00b845b99..52386e961b74f0ddebd38d1744fedb628b84f1e8 100644 (file)
--- a/main.cf
+++ b/main.cf
@@ -278,6 +278,17 @@ smtpd_tls_auth_only = yes
 smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache
 smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache
 
+# Milter configuration
+# Based on https://www.linode.com/docs/guides/configure-spf-and-dkim-in-postfix-on-debian-9/#testing-postfix-dkim-on-debian-9-with-a-gmail-test
+# http://www.opendkim.org/opendkim-README
+# http://www.postfix.org/MILTER_README.html
+# OpenDKIM
+milter_default_action = accept
+# Postfix ≥ 2.6 milter_protocol = 6, Postfix ≤ 2.5 milter_protocol = 2
+milter_protocol = 6
+smtpd_milters = unix:opendkim/opendkim.sock
+non_smtpd_milters = $smtpd_milters
+
 # Alex Dehnert, 2017-11-01
 # Based on https://serverfault.com/questions/663979/virtual-alias-domains-how-to-use-different-ip-addresses-when-forwarding-mail