Zabbix: Improve Postfix queue trigger/recovery

Signed-off-by: Greg Sutcliffe <fedora@emeraldreverie.org>

roles/base/files/postfix/zabbix-template.yml

@@ -1,7 +1,7 @@
 zabbix_export:
   version: '7.0'
   template_groups:
-    - uuid: 372f19ba622745aaa43b4fa0b5168262
+    - uuid: a333cbd6a3ad44baaa4eee4b0c0b1bec
       name: Fedora
   templates:
     - uuid: 76985efe0ea1479aa3d24a0a2c64e6d2
@@ -21,7 +21,9 @@ zabbix_export:
               value: queue
           triggers:
             - uuid: cc9ff19b502940af950215a931ee4079
-              expression: 'monoinc(/Postfix Mail Queue/postfix.queue,15m,"weak")=0 and last(/Postfix Mail Queue/postfix.queue)>{$POSTFIX.QUEUE.WARN}'
+              expression: 'monoinc(/Postfix Mail Queue/postfix.queue,15m,"strict")=1 and last(/Postfix Mail Queue/postfix.queue)>{$POSTFIX.QUEUE.WARN}'
+              recovery_mode: RECOVERY_EXPRESSION
+              recovery_expression: 'monoinc(/Postfix Mail Queue/postfix.queue,15m,"strict")=0 and last(/Postfix Mail Queue/postfix.queue)<{$POSTFIX.QUEUE.WARN}'
               name: 'Postfix: increasing mails in mailq - {ITEM.LASTVALUE1} queued'
               opdata: '{ITEM.LASTVALUE1} mails queued'
               priority: HIGH