Index: PKGBUILD
===================================================================
--- PKGBUILD	(revision 548400)
+++ PKGBUILD	(working copy)
@@ -3,7 +3,7 @@
 
 pkgname=mailman
 pkgver=2.1.29
-pkgrel=1
+pkgrel=2
 pkgdesc='The GNU Mailing List Manager'
 arch=(x86_64)
 license=('GPL')
Index: mailman.service
===================================================================
--- mailman.service	(revision 548400)
+++ mailman.service	(working copy)
@@ -9,5 +9,11 @@
 StandardError=syslog
 Type=forking
 
+ProtectSystem=full
+ProtectHostname=true
+
+MemoryDenyWriteExecute=yes
+PrivateDevices=yes
+
 [Install]
 WantedBy=multi-user.target