Setting up alarms for specific thresholds

Setting up alarms for specific thresholds

Good morning
      I am trying to setup an email alert only for Low Disc Space Alarms however i am struggling to find the option to do this. 

I can set it to alert when threshold is broken however this is all thresholds and not specific to Low Disc Space. 

Can you please advise if this is possible and if so how?

If it is not possible can i request this as feature?

I am using version 12200

Many thanks

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