Issue/comment creation from email

Question

According to the documentation:

If an issue key is NOT found in the subject, the in-reply-to header  is examined:

* If the email message is found to be a reply to another email message from which an issue was previously created, the body is processed and added as a comment to that issue.
* If the email message is NOT found to be a reply, a new issue is created.

How Jira understand from in-reply-to header that issue was previously created?

The header looks like:

JIRA.12421.1496872428283@ip-10-0-0-49

So this string 12421 is paired to the new issue durring creation in the database?

Im aware of:

https://jira.atlassian.com/browse/JRASERVER-43397

And in my logs i see:

Caesium-1-1 ERROR anonymous    Test [c.a.jira.mail.MailThreadManagerImpl] Unable to parse incoming In-Reply-To header <JIRA.12421.1496872428283@ip-10-0-0-49>

Is there a way to add comment to existing jira if issue number  is missing from the subject line?

Filip Stefanov · Answer

I figured out that some In-Reply-To/Reference headers are parsed properly!

For example:

References: <834226006731356@my.domain.com>

Nic Brough -Adaptavist- · Answer

No, JIRA needs to know what the issue is in order to create a comment on it.  As the "reply to" code is currently broken (as per the bug report you've found), the only other thing it can do is look for the issue number.