I had same problem as Lux (not thouisands but enough)
I found and read this thread.
I followed the suggestion of Mole and others downloading the trial version of Mail Washer.
Few minutes ago I bought it.
I now have $29.95 less but I am saving over half an hour per day, and I do not have anymore virus attachments in my eudora/attach folder (do not know why but they r was not being deleted when emptying the trash)
I think I got a great deal ad I would like to thank all of the posters of this thread.