diff --git a/ChangeLog b/ChangeLog
index dc0bf8ec..56d9ea7f 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -33,6 +33,7 @@ ver. 1.1.1-dev-1 (20??/??/??) - development nightly edition
 * `paths-debian.conf`:
   - default banactions are `nftables`
   - sshd backend switched to `systemd` (gh-3292)
+  - postfix backend switched to `systemd` (gh-3527)
 * `action.d/firewallcmd-ipset.conf`:
   - rename `ipsettype` to `ipsetbackend` (gh-2620), parameter `ipsettype` will be used now to the real set type (gh-3760)
 * `filter.d/apache-noscript.conf` - consider new log-format with "AH02811: stderr from /..." (gh-3900)
diff --git a/config/paths-debian.conf b/config/paths-debian.conf
index f3bf4ff0..f2abb3c3 100644
--- a/config/paths-debian.conf
+++ b/config/paths-debian.conf
@@ -13,6 +13,7 @@ banaction = nftables
 banaction_allports = nftables[type=allports]
 
 sshd_backend = systemd
+postfix_backend = systemd
 
 syslog_mail = /var/log/mail.log