HELP!! Keep getting "Unknown" Email on Yahoo account

[Brendabutt]

Can someone please tell me how to "block" or keep from getting a certain email on my Yahoo account. I tried blocking it, but the email shows INVALID_ADDRESS@ .SYNTAX-ERROR. as the sender and since this is not an address, it won't let me block it. Some of these emails come with messages, most don't. It shows the subject as None and the size is 955b. When I open it, it just shows my addy and the date--nothing else. I get 5 or 6 a day and would really like to know how to stop it. Thanks

[pandybat]

I too would like to find something like this. I am looking for an email bounce program that doesn't need Juno's POP3 information to run.

[jen6889]

If anybody knows a way to block it, I'm very much interested to hear it too.
That happens to me on my Mindspring email address too. Junk mail has gotten so bad, I don't even use that address anymore. My webspace allowed per email address is filled up completely on that address in just two days and 99% of it is JUNK! UGH! And a whole bunch of it is the same kind of email you're talking about - where the sender's name is blank and for some reason, when I look at the full message headers, the "From" section is empty too. When I try to block, it can't do it.
I really don't think there is any way to block it. I've tried everything I can think of.