When emails is sent with the same subject line, Jira Mail Handler creates new issue every time

[Victor_De_Los_Santos_Bernad]

Hi,

We work with another company that use their own Ticketing system. They send several emails for each ticket with different subjects which always contains a Ticket number. We would like to, when we receive an email with a new ticket number from their system, for jira to create one issue. If we receive more emails that contain on the subject that ticket number, instead of creating a new issue, add the new email as comments for the existing Jira issue. For example:

1- Customer sends an automated email with subject: Ticket INC2312313 has been created. This would create a ticket in Jira JIRA-12. 

2- Their team wants to make an update on the ticket, but they use a totally different subject and is not even a reply to their first one, with subject: Regarding INC2312313. Jira would detect the code and, instead of creating a new issue, would attach it to the already existing issue JIRA-12

Is there a way of achieving this, either natively or with plug-ins? Thanks!