Dumb Newbie

I had a mailing list up and running but ran into some difficulties because I didn't handle the foreign_submit line correctly. I deleted all the mailing lists from the control panel and tried to start over. My mail directory showed no files however when I reconstructed the list using the same list name and did a test subscription I had the last seven issues of my newsletter returned to me. There must be some files lurking somewhere that I can't find. My host does not offer tech support for listserve and I can't find anything about this in the manuals. Can anyone help?