diff -up dovecot-2.2.19/dovecot.service.in.privatetmp dovecot-2.2.19/dovecot.service.in
--- dovecot-2.2.19/dovecot.service.in.privatetmp 2015-10-05 12:50:24.273780394 +0200
+++ dovecot-2.2.19/dovecot.service.in 2015-10-05 12:50:56.281621589 +0200
@@ -26,6 +26,7 @@ After=local-fs.target network.target
Type=simple
ExecStart=@sbindir@/dovecot -F $OPTIONS
ExecReload=@sbindir@/dovecot reload
+PrivateTmp=true
NonBlocking=yes
[Install]