Monitor number of failed Email Actions

[TheCookieMonster]

We keep having the problem that our Zabbix fails to send an email, and the issue is down to the email server returning 'Login denied'
This is a bug in our email server which we are working on getting solved.
But in the meantime, im wondering if there is a way of me tracking within zabbix how many actions are failing, and ideally graphing these out within zabbix.
Does anyone have any suggestions?

[Daywalker]

My suggest solution would be to have a local postfix/exim/etc MTA on your Zabbix instance that the zabbix servers sends the mails to.
this MTA keeps its own queue that can be monitored with a simple UserScript like so:

For example we have the following UserParameters for our postfix MTA in place (i did not choose the item names...)
UserParameter=postfix.mail.queue,mailq | grep -v "Mail queue is empty" | egrep -c '^[0-9A-Z]{10} '
UserParameter=unix_mail.queue_hold,mailq | grep -v "Mail queue is empty" | egrep -c '^[0-9A-F]{10}[$!]'
UserParameter=unix_mail.queue_active,mailq | grep -v "Mail queue is empty" | egrep -c '^[0-9A-F]{10}[*]'
UserParameter=unix_mail.queue_deferred,mailq | grep -v "Mail queue is empty" | egrep -c '^[0-9A-F]{10}[^*]'