Is there a way to configure JIRA notifications to add an explanation of why you received them like the way bugzilla puts "You are receiving this mail because:" at the end of every mail?
With bugzilla I use this to prioritize email into different folders, based on whether I'm the assinee, reporter, or just cc'ed on bug and only get thunderbird to grab my attention when I'm the asignee. So far I've been unable to work out a way to filter JIRA emails.