I think the e-mail notification does show who the post is from but I have to say I missed it at first. However, it is the first line in the body of the e-mail. Or did you mean it should be in the subject line of the e-mail?
Also, oddly, the link was not a hyperlink in the notification for Ruth’s post above. Although previous notifications, the link has been a live hyperlink.
I have to say, I quite like seeing the info about the person who made the post. But I think it should run across the page rather than wrapping in a very narrow column. It currently takes up 5 lines where it could take up 1. It would be better if the “1 hour ago” appeared next to the “new” to the right of the photo. Then the line underneath would carry all the info about Ruth (or whoever!).