>that is nasty.
>
>I'd suspect this is being forwarded to the autoresponder, probably
>filtering for mail from your listserver (maybe specifically the list)
>
>check recent subscribers:
>   review _mylist_ (by date
>
>unfortunately, review will not display subscribers who have conceal turned on.

If you're the listowner or a site admin you can use

	review _mylist (by date all

and concealed subscribers will also be listed.