We are migrating from Lotus Notes to JIRA for our workflow system, and Lotus is able to send an email to CA Unincenter to have it open a request to another group (who isnt migrating to JIRA yet). The problem is CA uses the subject line to trigger the action. That group doesnt want to update their system at all, so we would need to match our subject line exactly. JIRA requires a prepended string for the subject line in the SMTP config, which breaks this. And no, you cant leave it null or put a space in there.
We are using the Script Runner plugin to send the customized email, but it cant override this "feature"