Could I close the ticket by email?

[Meck · Accepted solution]

Hi Jacco,

I'm not sure, but I think you could setup an automation rule at JIRA Service Desk to do it.

https://confluence.atlassian.com/servicedeskcloud/automating-your-service-desk-732528900.html

I think you can create something like #done at comment will be able to close the ticket. 

Regards,
Lameck. 

[Steven F Behnke]

The fuzzy-text search works pretty well for that!