I sent some PMs to someone and they haven't responded and I don't know if they even read them or not which makes me wonder, can this feature be added in the new forum, a sort of notification or a tick in the sender's sent PM box when the other person reads the PM?
I don't like this idea.
To me, it's an invasion of privacy. I like choosing when people think I'm online/available. I don't want alarms/triggers going off when I read a PM.
Besides, I think the forum admin already addressed this when they disabled being able to send a 1x1 image in a PM.