Short version: Is there a way for Jira mail handlers to scan PDF attachments for a ticket key so it can post a comment on that ticket? (like how Jira scans subject lines for existing ticket keys)
Long version: We have a JWT post function on a workflow that sends an email to an external vendor (Business X) with a subject containing the ticket key where the transition took place. Business X auto-logs this email in their system (Salesforce). At the end of their process, an employee logs work, which sends a return email with a PDF to our Jira (our default Jira email is the 'user' that logs the ticket in their system). Of course, their return subject line contains information relevant to their system, not ours. So they do not include the original key in their subject by default. This just creates extraneous new issues in our Jira project. But their PDF attachment does contain the issue key. Is there anything we can do in our Jira instance to attach these incoming emails to the correct ticket? The external vendor does not seem committed to changing their outgoing email settings so I'm investigating what we could do.
