Mistake

is there a way to see who you have recently purchased stuff from through mail? i was buying dragon scale fragments and someone mailed me a demon scale frag instead and i didnt notice until i tried to stack it with my own dragon scale frags. am i out of luck on finding out who sent it to me, since i do not remember his/her name?

Once you receive the item and delete the mail, there is no way of going back to check who sent you that mail. This is how people get scammed, through the use of similar/identical-looking items.

Being more careful next time is all you can do.