For the past month or so I have been dealing with weekly e-mails from Midrange News. These have been completely unsolicited and the first week I tried using their unsubsribe option online. That didn't work and I got the following error message:
Microsoft JET Database Engine error '80004005'
Los cambios solicitados en la tabla no se realizaron correctamente porque crearían valores duplicados en el índice, clave principal o relación. Cambie los datos en el campo o los campos que contienen datos duplicados, quite el índice o vuelva a definir el índice para permitir entradas duplicadas e inténtelo de nuevo.
/deleteemail.asp, line 17
So, the next week I tried it again with the same error. Then I sent standard emails to the postmaster and abuse accounts. The next week I got the same error and clicked the "Contact" link at their site and asked to be unsubscribed that way. Today I got the e-mail again and I created a SpamCop account and reported their IP that way. I just saw that they have a new contact so I will also try that method again.
I hate spammers...they probably harvested my address from Midrange lists!