I am using project_issue as an issue tracker and I use rules to notify people about updates or comments.
Now the problem is this:
* I use email rules to have people notified.
* People don't want to go to the issue tracker and just reply to the email.
* Those emails don't reach the issue tracker and bugs get closed with a 'Need more info' of 'cannot reproduce' status.
Wouldn't it be cool if those mails didn't get lost, but instead would be posted as a comment on that particular issue?
And for this reason I started developing such a module.