The only time that this has happened to me, (probably half a dozen times in as many years), has been from users of freeserve. I have also sent the very occasional e-mail which has arrived with a freeserve user in error.
The silly thing about this, is that I am not with freeserve, I use NTL broadband. Freeserve obviously have problems. Quite a few of my e-mails to my brother in law, bannister22 have ended up with a woman with a completely different name. It ended up with her deciding to change her e-mail address.
Andsome and all other responders. Thanks for everyone that as replied; interestingly I`m on NTL broadband, like Andsome. My question originally was trying to establish how I could rec e-mails that were not addressed to me?