is it possible to identify related emails to one Jira ticket only by the same subject?

[Anita_Karlsson]

I have email request enabled and an issue is created by email, all fine.
email subject => title of the issue
email body => description of the new issue

now all further emails with the same subject are created as new issues instead of being linked to the existing (first) one.

note1 email subject line is exactly the same for all emails
note2 the emails does not contain any Jira ticket number

how can the related emails (all with same subject) get correctly 'allocated' to one issue?

Thanks for the hints

[Nic Brough -Adaptavist-]

Jira's built-in email handlers rely on the issue key (as there's no way of knowing how else you users might want to relate stuff - for some people, the same subject might be key, but for most of us it is absolutely not unique and we need to be raising many issues with the same subject)

So, if you want your users to be commenting by email, you have to get them to include the issue key in the subject line.

Or, you need to find or write a new email handler that will read the incoming subject and try to match it with an existing summary.

[Anita_Karlsson]

Thanks for speedy feedback, would be nice if one could customize this 'rule'; as you say there are cases where  you will have many emails with same subject and others where the subject has a key already and this would be sufficient/ no other additional reference like Jira key required

[Nic Brough -Adaptavist-]

The problem for Atlassian is that there's no way to write a generic rule that suits all their clients.  So they leave that to the users to come up with and code for their own rules.