That's probably why, not sure if this plugin was updated to support 0.6.0. Also I'm not sure it was ever designed to parse bbcode on the fly like that. But I could be wrong.
I know that the SendGrid mailer supports reply-to-email functionality. But do any of the other mailers support this?
It's tough to tell because the official NodeBB plugins for this don't really document this functionality or not.
Only SendGrid and Mandrill plugins support it at this time.