I'm receiving miss addressed mail?

[Richard E Miles]

I am receiving mail addressed to someone else. My mail address is
r.godzilla at comcast.net. I have received mail addressed to:
r.godzilla at calamitygrowing.com and from:
joe-blow at comcast.net. These are not forwarded mails. How is this possible?
I use fetchmail to receive my mail. Is there anyway to stop this?
These are just two examples. I have received similar miss addressed mail from
other names also. Can a procmail rule be used to stop this? If so what would that
rule be?

-- 
Richard E Miles
Federal Way WA.
registered linux user 46097